Vicious Evisceration 
Feat 18BarbarianRageSource Core Rulebook pg. 93 2.0
You make a vicious attack that maims your enemy. Make a melee Strike. If the Strike hits and deals damage, the target is drained 1, or drained 2 on a critical success.
Traits
Rage: You must be raging to use abilities with the rage trait, and they end automatically when you stop raging.