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Molt Efficiency is an Arcane Enhancement for Warframes that grants additional Ability Duration over a period of time while Shields are active.
Effect[]
| Rank | % Duration per second | Max % Duration |
|---|---|---|
| 0 | 1 | 6 |
| 1 | 2 | 12 |
| 2 | 3 | 18 |
| 3 | 4 | 24 |
| 4 | 5 | 30 |
| 5 | 6 | 36 |
Acquisition[]
Molt Efficiency can be purchased from Cavalero for 
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 |
|---|---|---|---|---|
 |
Thrax Centurion | 0.33% | ~ 299 Kills | 2067 ± 689 Kills |
|
Thrax Legatus | 0.33% | ~ 299 Kills | 2067 ± 689 Kills |
|
Void Angel | 1.67% | ~ 59 Kills | 410 ± 136 Kills |
|
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[]
- Thrax enemies are abundant in Mobile Defense and Void Cascade missions.
- The Zariman Arcane drop is considered as a mod drop, and is thus affected by The Steel Path and Mod Drop Chance Booster.
Notes[]
- 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,
Nidus, 
Inaros, and 
Kullervo do not benefit from this Arcane as they do not deploy Shields.
Tips[]
- An ability with refreshable/extendable duration, such as
Splinter Storm and 
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. - The duration bonus accumulates during the mission entrance cinematic when loading into a mission from the Orbiter. Not skipping this cinematic will guarantee the maximum duration bonus at the start of the mission.
Patch History[]
Update 32.1 (2022-11-02)
- Fixed your Warframe’s Ability Duration stat increasing every time you mouse over it in the Helminth UI while Molt Efficiency is equipped (UI only issue, did not impact in-mission).
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
 Arcanes
| ||
|---|---|---|
| Eidolon • Arcane Helmets • Ostron • Operator • Amp • Solaris United • The Holdfasts • The Quills • Vox Solaris | ||
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13 comments
Very useful on invis frames imho.
Was just thinking about buying a bunch from Cavalero for my Ash invis built...already over 20 second duration
for now (29/12/2022) there is a bug with molt effiency, who work on archwing
I call that a feature, same thing happens with Arcane Avenger, they both apply in Archwing missions and I'm really hoping they keep that functionality intact
This is wrong, in game it says "+1 Arcane Revive", someone please correct this
Removed, thanks.
Question/Scenario: If the arcanes max (36%) is and i activate GLOOM.
In the event i loose my shields, but havent toggled gloom off.. will gloom still use the +36% duration bonus when calculating the energy drain/s/m ?
Channeled ability seems doesn't work with Molt Efficiency
They do. And also once the ability is activated the shield doesn't matter for the energy consumption rate. It matters only at the moment of activation like how Energy Conversion affects channeling abilities.
They better leave this feature alone.
Is this good on gauss
Does Guass benefit from ability duration?
Gauss from my experience benefits greatly from ability duration as it allows both his 2 and 4 to last longer. His 4 benefits more so since at max battery, he literally becomes immortal.
Therefore Molt Efficiency is probably a good choice on Gauss.
Very good on nidus and inaros, try it.
Wait wat?
It's a yawn troll.
Could remove primed continuity and use this and you can get free slot for better mods
But shield can be bothersome if under elec proc damage
Wow really?1?1
Not just electric, but any DoT that doesn’t bypass shielding.
This is so busted
Pretty sweet on Harrow. Curiously this arcane still affects his second ability despite it depleting his shields.
That's because duration is calculated on cast, shields are removed after that
Am I misunderstanding this, or could this be a real boon on Protea for free Duration increase on Turrets?
You are not misunderstanding. As long as your shield doesn't go to 0 you will have extra duration.
Sweet. Thanks for the response.
It seens not to be working i tested on max duration protea and it seens the same duration
Her turret base duration is extremely low compared to most abilities. At most a fully decked out version of this arcane adds at most about a second of extra time.
Never mind, answered my own question about Nova.
Still sounds interesting for Mag, as she used to be my main.
Inaros is crying, while Nidus is looking at him weirdly.
Meanwhile Grendel isn't quite sure what to make of all this, and settles down for a late morning breakfast.
In other words, he stole Konzu's early lunch.
Mag and Hildryn eating good.
I like that we are getting some important mods outsourced to / supported by Arcane slots, giving room for things like augments