Sadomasochism (3.5e Maneuver)

''When the going gets rough, you laugh it off, each injury sharpening your focus and whetting your blade. Astounded by your lack of attention to your grievous wounds, your opponents leave themselves wide open to attack.''

For every 10 points of damage you take or deal each round, you gain a +1 bonus to attack and damage rolls made with melee weapons on your next turn, up to a maximum bonus equal to your initiator level.