Empty Hand Mastery

(Oriental Adventures, page 80, DnD 3.0)

[General]

You have mastered the martial arts style of "Empty Hand"--a hard form emphasizing strikes with the hand.

Prerequisite

Improved Unarmed Strike, Power Attack, Fists of Iron, Sunder, Eagle Claw Attack, Ki Shout, Bluff 4 ranks

Benefit

Your unarmed damage increases by one die type, as if you were one size category larger than you are.