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Firefly
Honkai: Star Rail · Character

Firefly

Fire Destruction Break attacker with a timed enhanced state

Released Jun 19, 2024

Firefly spends HP with her ordinary Skill to restore Energy and advance her next action, then uses her Ultimate to enter Complete Combustion. In that state, her Enhanced Skill adds Fire Weakness to a target and scales its damage partly from Break Effect, while her increased SPD and Break effects create a limited attack window. Consider her when you can make use of Break-focused attacks and manage the state’s countdown.

ElementFirePathDestructionRarity5
Firefly GUIDE

Understand Firefly

Useful when…

  • Applying Fire Weakness to a selected enemy with the enhanced Skill
  • Taking advantage of increased SPD and Weakness Break Efficiency during Complete Combustion
  • Using her Technique to apply Fire Weakness to all enemies at the start of each wave

How do the two combat modes differ?

Outside Complete Combustion, Order: Aerial Bombardment consumes 40% of Firefly’s Max HP, restores 50% of Max Energy, deals single-target Fire damage, and advances her next action by 25%. If current HP is insufficient, it leaves her at 1 HP. Her Ultimate advances her action by 100% and starts Complete Combustion, with increased SPD and access to Enhanced Basic ATK and Enhanced Skill. The countdown uses fixed SPD 70; Firefly cannot use her Ultimate while the state is active. During the state, enhanced attacks increase Weakness Break Efficiency and the Break DMG dealt by SAM to enemy targets for that attack. The supplied second ability family repeats this same base kit, so it is not a separate mode to purchase.

What does the Enhanced Skill do?

Fyrefly Type-IV: Deathstar Overload restores 25% of Max HP in one supplied description, applies Fire Weakness to one target for two turns, then deals Fire damage to it and adjacent enemies. Its target and adjacent damage multipliers each include a Break Effect term and a flat percentage, with Break Effect capped at 360% in the listed parameters. The Technique enables free movement before a plunging attack and applies Fire Weakness to all enemies at the start of each wave for two turns, followed by area damage. Keep these enhanced attacks distinct from the ordinary Skill, which has an HP cost and action advance.

Where should investment go?

The Ultimate defines access to Complete Combustion and is the main state-enabling trace. The enhanced Skill and Break-oriented Talent support the damage and resilience pattern, while the ordinary Skill’s level affects its ATK multiplier rather than the listed HP cost, Energy restoration, or action advance. The listed bonus traces emphasize Break and SPD, with Effect RES also available. The attack description has duplicate traces in the alternate family; do not pay to level both families. As late trace examples cost more and include Tracks of Destiny and a weekly material, focus resources on the current kit’s Ultimate and attacks first.

What should players watch?

The ordinary Skill’s HP payment can drop Firefly to 1 HP if she lacks enough current HP, so the self-heal in the enhanced attacks matters to staying safe. Complete Combustion is governed by an Action Order countdown, not an unlimited stance, and the Ultimate cannot be used again during it. The listed enhanced Skill data includes one version with placeholders and another with explicit Fire Weakness duration, healing, and Break Effect cap; the numeric claims here use only the explicit version. Do not confuse normal and enhanced Skill costs or outcomes.

Limitations and tradeoffs

  • Her ordinary Skill spends HP and can leave her at 1 HP if current HP is insufficient.
  • Complete Combustion has a countdown and prevents another Ultimate while active.
  • Damage from the enhanced Skill includes a Break Effect term capped at 360% in the explicit supplied version.

Common mistakes to avoid

  • Treating the ordinary Skill as cost-free; it consumes 40% of Max HP and can leave her at 1 HP.
  • Assuming Complete Combustion is permanent or that she can use Ultimate during it.
  • Applying one trace-level investment to both duplicate alternate trace families.

Effects and reference details

Alternate ability definitions are included below. Compare each version separately when reading its effects.

Order: Flare Propulsion · Basic ATK

Deals Fire DMG equal to 50% of SAM's ATK to one designated enemy.

Ability descriptions by source level. Purchased caps and bonus levels are separate.

Source levelEffect
1Deals Fire DMG equal to 50% of SAM's ATK to one designated enemy.
2Deals Fire DMG equal to 60% of SAM's ATK to one designated enemy.
3Deals Fire DMG equal to 70% of SAM's ATK to one designated enemy.
4Deals Fire DMG equal to 80% of SAM's ATK to one designated enemy.
5Deals Fire DMG equal to 90% of SAM's ATK to one designated enemy.
6Deals Fire DMG equal to 100% of SAM's ATK to one designated enemy.
7Deals Fire DMG equal to 110% of SAM's ATK to one designated enemy.
8Deals Fire DMG equal to 120% of SAM's ATK to one designated enemy.
9Deals Fire DMG equal to 130% of SAM's ATK to one designated enemy.
10Deals Fire DMG equal to 140% of SAM's ATK to one designated enemy.
Order: Aerial Bombardment · Skill

Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 50% of this unit's Max Energy. Deals Fire DMG equal to 100% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.

Ability descriptions by source level. Purchased caps and bonus levels are separate.

Source levelEffect
1Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 50% of this unit's Max Energy. Deals Fire DMG equal to 100% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
2Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 51% of this unit's Max Energy. Deals Fire DMG equal to 110% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
3Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 52% of this unit's Max Energy. Deals Fire DMG equal to 120% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
4Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 53% of this unit's Max Energy. Deals Fire DMG equal to 130% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
5Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 54% of this unit's Max Energy. Deals Fire DMG equal to 140% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
6Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 55% of this unit's Max Energy. Deals Fire DMG equal to 150% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
7Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 56.25% of this unit's Max Energy. Deals Fire DMG equal to 162.5% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
8Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 57.5% of this unit's Max Energy. Deals Fire DMG equal to 175% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
9Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 58.75% of this unit's Max Energy. Deals Fire DMG equal to 187.5% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
10Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 60% of this unit's Max Energy. Deals Fire DMG equal to 200% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
11Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 61% of this unit's Max Energy. Deals Fire DMG equal to 210% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
12Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 62% of this unit's Max Energy. Deals Fire DMG equal to 220% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
13Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 63% of this unit's Max Energy. Deals Fire DMG equal to 230% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
14Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 64% of this unit's Max Energy. Deals Fire DMG equal to 240% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
15Consumes HP equal to 40% of this unit's Max HP and regenerates a fixed amount of Energy equal to 65% of this unit's Max Energy. Deals Fire DMG equal to 250% of SAM's ATK to one designated enemy. If the current HP is not sufficient, reduces SAM's HP to 1 when using this Skill. Advances this unit's next Action by 25%.
Fyrefly Type-IV: Complete Combustion · Ultimate

Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 30, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 10%, lasting until this current attack ends.
A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70.
SAM cannot use Ultimate while in Complete Combustion.

Ability descriptions by source level. Purchased caps and bonus levels are separate.

Source levelEffect
1Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 30, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 10%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
2Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 33, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 11%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
3Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 36, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 12%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
4Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 39, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 13%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
5Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 42, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 14%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
6Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 45, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 15%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
7Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 48.75, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 16.25%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
8Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 52.5, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 17.5%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
9Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 56.25, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 18.75%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
10Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 60, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 20%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
11Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 63, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 21%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
12Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 66, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 22%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
13Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 69, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 23%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
14Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 72, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 24%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
15Enters the Complete Combustion state, advances this unit's Action by 100%, and gains Enhanced Basic ATK and Enhanced Skill. While in Complete Combustion, increases SPD by 75, and when using the Enhanced Basic ATK or Enhanced Skill, increases this unit's Weakness Break Efficiency by 50% and increases the Break DMG dealt by SAM to the enemy targets by 25%, lasting until this current attack ends. A countdown timer for the Complete Combustion state appears in the Action Order. When the countdown timer's turn starts, SAM exits the Complete Combustion state. The countdown timer has a fixed SPD of 70. SAM cannot use Ultimate while in Complete Combustion.
Chrysalid Pyronexus · Talent

The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 20%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 10%.
If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.

Ability descriptions by source level. Purchased caps and bonus levels are separate.

Source levelEffect
1The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 20%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 10%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
2The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 22%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 12%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
3The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 24%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 14%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
4The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 26%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 16%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
5The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 28%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 18%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
6The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 30%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 20%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
7The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 32.5%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 22.5%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
8The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 35%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 25%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
9The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 37.5%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 27.5%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
10The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 40%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 30%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
11The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 42%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 32%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
12The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 44%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 34%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
13The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 46%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 36%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
14The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 48%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 38%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
15The lower the HP, the less DMG received. When HP is 20% or lower, the DMG Reduction reaches its maximum effect, reducing up to 50%. During the Complete Combustion, the DMG Reduction remains at its maximum effect, and the Effect RES increases by 40%. If Energy is lower than 50% when the battle starts, regenerates Energy to 50%. Once Energy is regenerated to its maximum, dispels all debuffs on this unit.
Attack

Attacks an enemy, and after entering combat, reduces their Toughness of the corresponding Type.

Δ Order: Meteoric Incineration · Technique

Leaps into the air and moves about freely for 5 seconds, which can be ended early by launching a plunging attack. When the duration ends, plunges and immediately attacks all enemies within a set area. At the start of each wave, applies a Fire Weakness to all enemies, lasting for 2 turn(s). Then, deals Fire DMG equal to 200% of SAM's ATK to all enemies.

Ability descriptions by source level. Purchased caps and bonus levels are separate.

Source levelEffect
1Leaps into the air and moves about freely for 5 seconds, which can be ended early by launching a plunging attack. When the duration ends, plunges and immediately attacks all enemies within a set area. At the start of each wave, applies a Fire Weakness to all enemies, lasting for 2 turn(s). Then, deals Fire DMG equal to 200% of SAM's ATK to all enemies.
Fyrefly Type-IV: Pyrogenic Decimation · Basic ATK

Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 100% of SAM's ATK to one designated enemy.

Ability descriptions by source level. Purchased caps and bonus levels are separate.

Source levelEffect
1Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 100% of SAM's ATK to one designated enemy.
2Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 120% of SAM's ATK to one designated enemy.
3Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 140% of SAM's ATK to one designated enemy.
4Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 160% of SAM's ATK to one designated enemy.
5Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 180% of SAM's ATK to one designated enemy.
6Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 200% of SAM's ATK to one designated enemy.
7Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 220% of SAM's ATK to one designated enemy.
8Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 240% of SAM's ATK to one designated enemy.
9Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 260% of SAM's ATK to one designated enemy.
10Restores HP by an amount equal to 20% of this unit's Max HP. Deals Fire DMG equal to 280% of SAM's ATK to one designated enemy.
Fyrefly Type-IV: Deathstar Overload · version 1 · Skill

Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 100%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 50%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.

Ability descriptions by source level. Purchased caps and bonus levels are separate.

Source levelEffect
1Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 100%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 50%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
2Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 110%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 55%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
3Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 120%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 60%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
4Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 130%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 65%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
5Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 140%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 70%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
6Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 150%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 75%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
7Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 162.5%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 81.25%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
8Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 175%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 87.5%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
9Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 187.5%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 93.75%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
10Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 200%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 100%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
11Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 210%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 105%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
12Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 220%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 110%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
13Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 230%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 115%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
14Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 240%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 120%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
15Restores HP by an amount equal to 25% of this unit's Max HP. Applies Fire Weakness to one designated enemy, lasting for 2 turn(s). Deals Fire DMG equal to (0.2 × Break Effect + 250%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 125%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
Fyrefly Type-IV: Deathstar Overload · version 2 · Skill

Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 100%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 50%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.

Ability descriptions by source level. Purchased caps and bonus levels are separate.

Source levelEffect
1Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 100%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 50%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
2Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 110%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 55%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
3Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 120%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 60%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
4Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 130%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 65%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
5Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 140%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 70%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
6Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 150%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 75%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
7Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 162.5%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 81.25%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
8Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 175%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 87.5%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
9Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 187.5%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 93.75%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
10Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 200%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 100%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
11Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 210%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 105%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
12Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 220%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 110%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
13Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 230%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 115%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
14Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 240%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 120%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.
15Restores HP by an amount equal to 25% of this unit's Max HP. Adds Fire Weakness to one designated enemy and its adjacent targets, lasting for 2 turns. Deals Fire DMG equal to (0.2 × Break Effect + 250%) of SAM's ATK to this target. At the same time, deals Fire DMG equal to (0.1 × Break Effect + 125%) of SAM's ATK to adjacent targets. The Break Effect taken into the calculation is capped at 360%.

References and version

Game data version: 4.6.0

Firefly — Honkai: Star Rail Wiki ↗hsr-build.com ↗honkai-star-rail.fandom.com ↗
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Combine leveling, ascension and individual upgrades in one material budget.

Current
Target
Check account unlock requirements
  1. 0Lv. 20
  2. 1Lv. 30
  3. 2Lv. 40
  4. 3Lv. 50
  5. 4Lv. 60
  6. 5Lv. 70
  7. 6Lv. 80
Purchased tracesCurrentTarget
Order: Flare PropulsionOrder: Flare Propulsion
Order: Aerial BombardmentOrder: Aerial Bombardment
Fyrefly Type-IV: Complete CombustionFyrefly Type-IV: Complete Combustion
Chrysalid PyronexusChrysalid Pyronexus
Module α: Antilag OutburstModule α: Antilag Outburst
Module β: Autoreactive ArmorModule β: Autoreactive Armor
Module γ: Core OverloadModule γ: Core Overload
Break BoostBreak Boost
↳ Effect RES BoostEffect RES Boost · requires Module α: Antilag Outburst
↳ Break BoostBreak Boost · requires Effect RES Boost
↳ SPD BoostSPD Boost · requires Break Boost
↳ Break BoostBreak Boost · requires Module β: Autoreactive Armor
↳ Effect RES BoostEffect RES Boost · requires Break Boost
↳ Break BoostBreak Boost · requires Effect RES Boost
↳ SPD BoostSPD Boost · requires Module γ: Core Overload
↳ Effect RES BoostEffect RES Boost · requires SPD Boost
↳ Break BoostBreak Boost · requires SPD Boost
Order: Flare PropulsionOrder: Flare Propulsion
Order: Aerial BombardmentOrder: Aerial Bombardment
Fyrefly Type-IV: Complete CombustionFyrefly Type-IV: Complete Combustion
Chrysalid PyronexusChrysalid Pyronexus
Module α: Antilag OutburstModule α: Antilag Outburst
Module β: Autoreactive ArmorModule β: Autoreactive Armor
Module γ: Core OverloadModule γ: Core Overload
Break BoostBreak Boost
↳ Effect RES BoostEffect RES Boost · requires Module α: Antilag Outburst
↳ Break BoostBreak Boost · requires Effect RES Boost
↳ SPD BoostSPD Boost · requires Break Boost
↳ Break BoostBreak Boost · requires Module β: Autoreactive Armor
↳ Effect RES BoostEffect RES Boost · requires Break Boost
↳ Break BoostBreak Boost · requires Effect RES Boost
↳ SPD BoostSPD Boost · requires Module γ: Core Overload
↳ Effect RES BoostEffect RES Boost · requires SPD Boost
↳ Break BoostBreak Boost · requires SPD Boost

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