[Dean hasn't taken back anything he's ever handed Cain or been aware of him having, either, except his personal Glock. He says nothing about that, instead jumping in right where he's been namechecked.]

Spooky reasons, huh? Not unless they're feeding zombies, which I might add Arthas has been raising in the CES, or an extremely high level voodoo priest or priestess I don't know about.

But most the spells I know that call for animal organs are meant to be helpful, so I doubt it.