User blog comment:GotMilk5101520/How will the Tartarus Arc Part 4 will end?/@comment-25111584-20140710204348/@comment-25111584-20140710212112

Hmmm, you're correct about the sacrifices part, but I think only Ul's counts, Ultear's was general, not just for Gray.

... You even replied to the post about Gray getting Deliora's powers, he'd use those Demon Slaying powers to somehow defeat E.N.D., then die himself somehow (answers your problem with him not wanting Deliora inside him, kill off both of them :P).