When you have 8 stacks, the next time you transform into Bear Form, your next Mangle deals 50% increased damage or your next If «Brutal Slash»: Brutal Slash; otherwise: Swipe deals 50% increased damage. Either generates 15 extra Rage.
Mangle grants Feline Potential. When you have 6 stacks, the next time you transform into Cat Form, gain 5 combo points and your next Ferocious Bite or Rip deals 50% increased damage for its full duration.