Combat Momentum

Your attacks gain in power the as you cut through your enemies' ranks.

Prerequisite(s): Str 13, Cleave, Great Cleave, Power Attack, base attack bonus +12

Benefit: If you deal a creature enough damage to drop a creature below 0 hit points in melee combat, you gain a cumulative +1 circumstance bonus to damage for all melee weapon attacks until the end of your current action.