Superior Unarmed Strike( Tome of Battle: The Book of Nine Swords, p. 33)
Your unarmed strikes have become increasingly deadly, enabling you to strike your foes in their most vulnerable areas.
Improved Unarmed Strike (PH) , Base attack bonus +3,
You deal more damage with your unarmed strikes, as shown on the table below.
|Character Level||Unarmed Damage|
If you are a monk, you instead deal unarmed damage as a monk four levels higher.