Arcane Ultimatum is an Arcane Enhancement that, upon performing a melee finisher kill, increases the Warframe's Armor for 45 seconds. However, it does not activate off of ground finishers.

Can be sold for Credits64.png 1,000.


Rank Flat Armor Bonus
0 +200
1 +400
2 +600
3 +800
4 +1000
5 +1200


Awarded for capturing the Eidolon Gantulyst.

Operation: Scarlet Spear sold Arcane Ultimatum for 2,000 ScarletCredits.png Scarlet Credits.

Operation: Orphix Venom sold Arcane Ultimatum for 400 PhasicCells.png Phasic Cells.

Item Source Chance Expected Nearly Guaranteed
ArcaneUltimatum.png Veil Proxima Orphix / C 2.82% ~ 35 C Rotations 241 ± 80 C Rotations
ArcaneUltimatum.png Neptune Proxima Orphix / C 3.45% ~ 28 C Rotations 196 ± 65 C Rotations
ArcaneUltimatum.png Eidolon Gantulyst Capture 5.92% ~ 16 Kills 113 ± 37 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.


  • The additional armor is unaffected by mods. For example, a ChromaIcon272.png Chroma with a max rank Mod TT 20px.png Steel Fiber, and an active rank-5 ArcaneUltimatum.png Arcane Ultimatum will have an armor rating of:
Armor = Base Armor × (1 + Armor Mod) + Arcane Ultimatum
Armor = 350 × (1 + 1.1) + 1200
Armor = 1935
  • Mercy kills will activate the effect.
  • The effect can be activated by the user's Sunika or Sahasa Kubrow performing a finisher attack via their unique precepts.
  • Duration can be refreshed.


  • This arcane was originally dropped in The Jordas Verdict. Following Update 22.14 (2018-03-01), all Trial missions were retired from the game and the arcane drops in turn were moved to the Eidolons instead.

Patch History[]

Update 31.6 (2022-06-09)


We’ve adjusted the values of older Arcanes with the goal of making lower rank Arcanes more viable, and more desirable while collecting as a result. In short, there are three stats that each Arcane tends to have (speaking generally) -- for example, a percentage chance, a stat buff, and the duration of the buff.

Certain Arcanes increase all of these stats per rank (making them scale exponentially), but we are changing it so that only one stat is affected by rank (making it scale linearly). The other stats will now be at the max-rank value regardless of the Arcane Rank, thereby buffing lower-rank Arcanes as a result.

Arcane Ultimatum

On Finisher Kill: 100% (was 25%) chance for +200/1200 Armor for 45s (was 8s)

  • Now that the chance is guaranteed, the new description is “On Finisher Kill: +200/1200 Armor for 45s”

Update 22.12 (2018-02-09)

  • Armor applied is now an absolute amount (instead of relative) with a base value of 150 with a duration of 5 seconds at base rank.

Update 17.9.1 (2015-10-29)

  • Introduced with The Jordas Verdict.