User blog comment:Calvincambridge30/Versus/@comment-27006668-20151022153447/@comment-3045936-20151024002434

Ok, if a Leviathan couldn't shut off their power. I can't be foresure.

Also, the aquarium could refer to ANYTHING. "You know Leviathans can kill Angels. That is why my father looked them in Purgatory. They are Parana that would eat the whole aquarium." Castiel.

Also about Godstiel. In that same breathe he threaten to get rid of Hell completely. He only kept for his enemies, and to keep the cage. I don't think Michael could be killed easy by Godstiel. I think if Godstiel could destroy a spirit world like Hell, I think that trumps Michael. As if he could why not just break through to kill Lucifer in the first place?

Even my evidence is suggestible. But so is yours.