User blog comment:ImperiexSeed/Supernatural Mysteries/@comment-3481504-20120510175752

Look, in "There Will Be Blood" clip, it showed a possible partnership bewtween the Alpha Vampire and the Levithans, specifcally Edgar.

If the Alpha didn't do as he says, he could just kill him. As he killed angels, and Angels are stronger than the Alpha Vampire.

By the looks of it, the the material needed requires that Alpha's blood, so wouldn't it be eaiser for Leviathans to just kill him, thus no way for them to die.