:::::This is essentially a scaling feat that you must take 3 times, the first time you take it you gain a growing bonus to Attack/AC that caps at +5 at level 20, the second time you gain the ability to force rerolls from a single opponent making a attack roll against you, the third time you gain the ability to reroll attacks against a single opponent. When you look at the second 2 at face value yes it seems over powered, until you realise that it cost Ki to use, and generally a monk will not have a very large Ki pool to keep up a constant offense and defense. Effectivly every feat I have been posting has a Ki cost to it and unless a monk were to take say GW's way of the hare feat a monk will lose effectiveness after a single encounter for they will be constantly spending Ki points.