Superior Unarmed Strike

 
Prerequisite(s): Improved Unarmed Strike, Base Attack Bonus 3+
 
Benefit: You deal more damage with your unarmed strikes, as shown on the table below.
 
Character Level: Unarmed Damage
3rd: 1d4
4th-7th: 1d6
8th-11th: 1d8
12th-15th: 1d10
16th-20th: 2d6
Special: If you are a monk, you instead deal unarmed damage as a monk four levels higher.
 
Source: Tome of Battle: The Book of Nine Swords