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Before Dawn
Honkai: Star Rail · Light Cone

Before Dawn

The Erudition CRIT DMG and attack-type Light Cone

Introduced in v1.0

Before Dawn increases CRIT DMG and boosts Skill and Ultimate damage; using either grants Somnus Corpus, which is consumed by a Follow-Up ATK for an additional damage increase. Consider it for an Erudition wearer who uses these attacks and triggers Follow-Up ATKs.

PathEruditionRarity5
Before Dawn GUIDE

Understand Before Dawn

Useful when…

  • An Erudition wearer who uses Skill or Ultimate and can trigger Follow-Up ATKs afterward.
  • A damage pattern that benefits from CRIT DMG plus distinct Skill, Ultimate, and Follow-Up ATK bonuses.

How does Somnus Corpus work?

At S1, the wearer gains 36% CRIT DMG and deals 18% more damage with Skill and Ultimate. After using Skill or Ultimate, the wearer gains Somnus Corpus. When a Follow-Up ATK triggers, it consumes Somnus Corpus and that Follow-Up ATK deals 48% more damage. S5 raises the bonuses to 60% CRIT DMG, 30% Skill and Ultimate damage, and 80% Follow-Up ATK damage. The Follow-Up bonus depends on having gained the effect first; it is not a permanent increase.

What attack patterns does it favor?

This Light Cone supports a cycle in which Skill or Ultimate use precedes a Follow-Up ATK, while the CRIT DMG applies without that sequence. A Dream Scented in Wheat provides CRIT Rate and boosts Ultimate and Follow-Up ATK damage directly. After the Charmony Fall instead grants Break Effect and SPD after Ultimate. A Star That Lights the Night has effects tied to Assist Skill use and Sail stacks. These candidates emphasize different attack types and triggers; compare them to the wearer's actual kit.

How should you invest?

Promotion advances the Light Cone through six stages and raises base stats. Superimposition increases CRIT DMG and the damage bonuses for Skill, Ultimate, and Follow-Up ATK, but the shown steps each consume a duplicate. Promotion is the direct base-stat investment; refinement is most relevant when the wearer makes use of all three specified damage effects.

Limitations and tradeoffs

  • The Follow-Up ATK bonus requires first gaining Somnus Corpus with Skill or Ultimate.
  • Somnus Corpus is consumed by a Follow-Up ATK, so its bonus is not permanent.

Common mistakes to avoid

  • Do not expect the Follow-Up ATK bonus without first using Skill or Ultimate to gain Somnus Corpus.
  • Do not treat Somnus Corpus as a persistent stack; a Follow-Up ATK consumes it.

Effects and reference details

Long Night · Superimposition

The passive activates only on a wearer following Erudition. Each additional rank uses a duplicate or its designated special material.

S1 Increases the wearer's CRIT DMG by 36%. Increases DMG dealt by the wearer's Skill and Ultimate by 18%. After the wearer uses Skill or Ultimate, gains "Somnus Corpus." Upon triggering a Follow-Up ATK, consumes "Somnus Corpus," and increases DMG dealt by Follow-Up ATK by 48%.

S2 Increases the wearer's CRIT DMG by 42%. Increases DMG dealt by the wearer's Skill and Ultimate by 21%. After the wearer uses Skill or Ultimate, gains "Somnus Corpus." Upon triggering a Follow-Up ATK, consumes "Somnus Corpus," and increases DMG dealt by Follow-Up ATK by 56%.

S3 Increases the wearer's CRIT DMG by 48%. Increases DMG dealt by the wearer's Skill and Ultimate by 24%. After the wearer uses Skill or Ultimate, gains "Somnus Corpus." Upon triggering a Follow-Up ATK, consumes "Somnus Corpus," and increases DMG dealt by Follow-Up ATK by 64%.

S4 Increases the wearer's CRIT DMG by 54%. Increases DMG dealt by the wearer's Skill and Ultimate by 27%. After the wearer uses Skill or Ultimate, gains "Somnus Corpus." Upon triggering a Follow-Up ATK, consumes "Somnus Corpus," and increases DMG dealt by Follow-Up ATK by 72%.

S5 Increases the wearer's CRIT DMG by 60%. Increases DMG dealt by the wearer's Skill and Ultimate by 30%. After the wearer uses Skill or Ultimate, gains "Somnus Corpus." Upon triggering a Follow-Up ATK, consumes "Somnus Corpus," and increases DMG dealt by Follow-Up ATK by 80%.

References and version

Game data version: 4.6.0

Before Dawn — Honkai: Star Rail Wiki ↗honkai-star-rail.fandom.com ↗
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