Exploit Weakness (Ex)
Replaces: Ki Pool
At 4th level, as a swift action, a martial artist can observe a creature or object to find its weak point by making a Wisdom check and adding his monk level against a DC of 10 + the object’s hardness or the target’s CR. If the check succeeds, the martial artist gains a +2 bonus on attack rolls until the end of his turn, and any attacks he makes until the end of his turn ignore the creature or object’s DR or hardness.
A martial artist may instead use this ability as a swift action to analyze the movements and expressions of one creature within 30 feet, granting a bonus on Sense Motive checks and Reflex saves and a dodge bonus to AC against that opponent equal to 1/2 his monk level until the start of his next turn.
This ability replaces ki pool. Extreme Endurance (Ex): At 5th level, a martial artist gains immunity to fatigue. At 10th level, he also gains immunity to exhaustion. At 15th level, he gains immunity to stunning. At 20th level, he gains immunity to death effects and energy drain. This ability replaces purity of body, diamond body, and perfect self.