Unblinking Flame Fist

Combat

You can exploit the weaknesses in your opponents’ defenses, like a flame seeking fuel to consume.

Prerequisite: Int 13; Wis 13; Combat Expertise; Perfect Style; Stunning Fist; Unblinking Flame Feint; base attack bonus +13 or monk level 13th.

Benefit: When using Perfect Style, the save DC of your stunning fist attack increases by 2 against flat-footed targets. When you spend 1 ki point to gain the benefits of Improved Feint for 1 round, you can attempt a feint as part of your movement when charging.

Source: Adventurer's Guide