Molt Efficiency is an Arcane Enhancement for Warframes that grants additional Ability Duration over a period of time while Shields are active.


Rank % Duration per second Max % Duration
0 1 6
1 2 12
2 3 18
3 4 24
4 5 30
5 6 36


Molt Efficiency can be purchased from Cavalero for ReputationBlackx64.png 7,500, requiring Rank 3 - Guardian with The Holdfasts. It can also be dropped by Thrax Centurion, Thrax Legatus, and Void Angels on the Zariman Ten Zero.

Item Source Chance Expected Nearly Guaranteed
MoltEfficiency.png Thrax Centurion 0.33% ~ 299 Kills 2067 ± 689 Kills
MoltEfficiency.png Thrax Legatus 0.33% ~ 299 Kills 2067 ± 689 Kills
MoltEfficiency.png Void Angel 1.67% ~ 59 Kills 410 ± 136 Kills
MoltEfficiency.png Ravenous Void Angel 0.67% ~ 149 Kills 1032 ± 344 Kills

All drop rates data is obtained from DE's official drop tables. See Mission Rewards#Standard Missions for definitions on reward table rotations.
For more detailed definitions and information, visit here.

Farming Tips[]


  • Duration bonus is additive to Ability Duration mods.
  • When all shields are lost, any accumulated bonus is lost.
    • Once shields begin replenishing, the duration bonus starts accumulating again.
  • Naturally, NidusIcon272.png Nidus and InarosIcon272.png Inaros do not benefit from this Arcane as they do not deploy Shields.


  • An ability with refreshable/extendable duration, such as SplinterStorm130xDark.png Splinter Storm and Mod TT 20px.png Lasting Covenant, highly benefits from Molt Efficiency as the duration bonus upon cast will always be retained, even when the Arcane buff is temporarily disabled by losing Shields.

Patch History[]

Hotfix 31.6.4 (2022-07-14)

  • Also fixed the Molt Arcanes and Arcane Pulse not indicating that they will give an extra Warframe revive at Rank 3 and up.

Update 31.5 (2022-04-27)

  • Introduced