Arcane Rage is an Arcane Enhancement provides a 15% chance to increase the damage of primary weapons for a 24 seconds upon achieving a headshot.
Can be sold for  1,000.

Update 31.6 (2022-06-09)

ARCANE STAT CHANGES PER RANK
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 Rage
On Headshot: 15% (was 3%) chance for +30%/180% Damage to Primary Weapons for 24s (was 4s)
Hotfix 24.1.4 (2018-12-10)

Updated Arcane Rage description to read "Primary Weapons" instead of "Rifles".
Update 22.12 (2018-02-09)

Now has a base effect of 30%.
Update 16.0 (2015-03-19)

Introduced.