Dude, why do you lie to us? I will be crying myself to sleep from now on... with tears of joy at the overwhelming AWESOMENESS coupled with the knowledge that we will almost never be able to compete with this.

Anyway, my only major problems are the blood drain, because 3d4 Con damage per round is way powerful, and the Wish graft that doesn't have any XP cost. That, and the Nosomatic Chirurgeon might be a bit excessive with the ability damage potential.

Although, it is a tad unfortunate that the Xenomorph name can only apply to one PrC, since it could apply equally, if not better, to the Ozodrin-Xenoalchemist combination class.