Needs review
Source: Rokugan Campaign Setting

Description: You can summon the power of your chi into an impressive unarmed strike.

Prerequisites: Improved Unarmed Strike, Void Use, Depths of the Void, Any two Kiho feats

You can spend a Void Point to gain a +1 enhancement bonus to your unarmed strikes for a number of minutes equal to your level. You may use this ability as a free action. If you thereafter attack an opponent in the same round in which it is used, you gain a +2 Void bonus to your first unarmed attack roll. If you also have the monk's ki strike ability, this ability stacks for the purpose of overcoming damage reduction only.

Special

This feat may be taken multiple times. The enhancement bonus gained from this feat can never exceed your level divided by four.