A439: the weapon abilities Trasmuting and Shadowstriking (ToM, not MiC...I may have spelled it wrong because there's Shadowstriking and Shadow Strike, one's ignore DR and the other is a few rounds per day strike touch AC I believe), epic VoP, Improved Ki Strike, epic AoMF. Only the first two are worth it. Get them on a Necklace of Natural Attacks. See my monk's handbook for more.