When making a Melee or Brawl combat check, the character may suffer a number of strain, then upgrade the ability of his combat check by that number. The number cannot exceed his ranks in Frenzied Attack.
Toughend
Gain +2 in Wounds
Lethal Blows
The character adds +10 per rank of Lethal Blows to any Critical Injury rolls inflicted on opponents.
Feral Strengh
The character deals +1 damage to one hit on all successful Brawl and Melee checks per rank of Feral Strength.