Adrenaline is a brutality-scaling mutation which makes melee attacks heal the player for 5 seconds, after dodging an attack at the last moment.
Details[]
Scroll Cap: 30
Special Effects:
After dodging an attack at the last moment, for 5 seconds, the player's melee attacks can heal them. The amount of healing is [0.0015 base]% max health per damage point from attacks.
The calculation uses the base damage per hit of attacks, meaning the damage increases from scrolls, affixes, etc. is excluded from how much health is restored.
Description changed from "Your melee attacks give you back a small amount of HP depending on attack damage for 3 seconds after dodging an attack at the last moment."