A Monk's Power (3.5e Feat)
From D&D Wiki
A Monk's Power [General]
This feat grants you good unarmed damage progression for your fists if you sacrifice your weapons.
Prerequisite: Wis 13, Improved Unarmed Strike
Benefit: When you take this feat your unarmed strike damage increases to 1d6. At level 5, this increases to 1d8. At level 10, this increases to 1d10. Also your fists are considered to be "natural weapons". You lose the benefit of this feat if you wield a weapon
Normal: A character would normally do 1d3 damage with their unarmed strike.