Heroic Deed: Staggering Strike

Available to FGT 6+ class, and to THF or Subs 10+. When you make a successful weapon attack against a humanoid whose level or HD are less than your overall level, you can expend a Risk Die by rolling it. If it doesn't come up '1', you deal an additional die of weapon damage with the current attack, and with any future attacks you land of this particular foe in this particular combat encounter. At the end of the encounter, there is an X% chance that you gain one percentile point to your DEX, where X is the total number of attacks you landed on that foe.