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Tenet Ferrox
Warframe · Equipment

Tenet Ferrox

Charged speargun with a separate throwable spear attack and an electric attraction field.

Released Nov 30, 2022

Tenet Ferrox suits deliberate charged shots followed by a spear throw when you want its distinct projectile and attraction-field effects. Its charged hit has strong critical stats, while the throw and field use different, lower critical chances and their own status chances; treat these as separate attacks when building or using it.

TypeSpeargunMastery requirement16Critical chance34%Critical multiplier3
Tenet Ferrox GUIDE

Understand Tenet Ferrox

Useful when…

  • Use the charged hitscan shot for aimed primary fire and its small radial hit.
  • Throw the spear when you want the projectile attack and its attraction field.

How its attacks differ

The charged shot takes 0.4 seconds to charge and deals Impact, Puncture, and Slash damage. It has 34% critical chance, a 3x critical multiplier, and 26% status chance. Its radial attack is a separate area hit with 30% damage falloff by 4 m. Spear Throw is a projectile with 4% critical chance, 2x multiplier, and 40% status chance; Attraction Field is an area attack with 4% critical chance and 50% status chance, dealing Electricity damage.

Handling and investment

The primary trigger is Charge, with a 20-round magazine and 1.8-second reload. Its two Madurai and one Vazarin polarity are useful starting points for matching compatible mods. Prioritize a setup for the charged shot if that is your main fire mode; do not assume those critical stats apply to the thrown spear or field.

Choosing between alternatives

The Battacor also builds charge through kills for a discharge, while the Ax-52 has different aiming and hip-fire conditions. Those are distinct handling hooks, not evidence that either is a direct upgrade. Consider them when their specific charge or firing conditions fit your preferences.

Limitations and tradeoffs

  • Charged primary fire requires a 0.4-second charge.
  • Thrown spear and attraction field have much lower critical chance than the charged hit.

Common mistakes to avoid

  • Do not use the charged shot's 34% critical chance as the spear's value; the spear lists 4%.
  • Do not treat the radial attack, spear projectile, and attraction field as one attack mode.

Effects and reference details

Detailed properties

Critical chance34%
Critical multiplier3×
Status chance26%
Listed attack rate2.67
Accuracy16.67
TriggerCharge
Magazine size20
Reload time1.8 seconds
Multishot1
Foundry Credits10,000
Foundry time0.02 hours

Attack modes

ModeCritical chanceCritical multiplierStatus chanceDamage types
Charged Shot34%3×26%impact: 20, slash: 40, puncture: 140
Radial Attack34%3×26%impact: 6, slash: 12, puncture: 42
Spear Throw4%2×40%impact: 35, slash: 10, puncture: 5
Attraction Field4%2×50%electricity: 150

Each mode has its own properties. Alternate forms may require additional unlocks; these values are not combined build damage.

References and version

Game data version: Pinned public export

Tenet Ferrox — WARFRAME Wiki ↗
Technical source data for verification

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Mod capacity and investment

Unranked base capacity: 15 + one per two Mastery Ranks through MR30. Legendary ranks add one each. Rank-40 equipment unlocks two extra ranks per installed Forma.

Eight standard slots

Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
Slot 8
0Drain
30Capacity
30Remaining

The selected mods fit the verified slot, applicability and capacity constraints.

Upgrading these mods from their entered owned ranks costs 0 Endo and 0 Credits. Your shared Endo and Credits are allocated in My plan.

Select actual installed polarities. A planned polarity change requires the appropriate Forma and resets equipment rank. Conditional combat effects and unmodeled advanced upgrades stay separate.

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