Falling Sun Attack

 
Prerequisite(s): Stunning Fist, one Setting Sun maneuver
 
Benefit: You can declare any-Setting Sun strike delivered with an unarmed strike to be a stunning attack. In addition, add 1 to the save DC of your Stunning Fist attacks and 1 to the save DC of your Setting Sun strikes. Using this feat expends a use of your stunning attack for the day.
 
Source: Tome of Battle: The Book of Nine Swords