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human
[Supernatural] What five things can the Colt not kill?

After Dean blasted Lucifer in the face with the Colt, Lucifer said that "There's only five things in creation that gun can't kill," which I would assume includes Archangels, probably all of them or if not, then maybe only Lucifer and Micheal.  I doubt it could kill God or Death, but could it kill a Leviathan?  Or Eve?
gpt
That we know of, it cannot kill Lucifer. Suspected, but not confirmed, are that the other four consist of God, Death, possibly Eve (as they used the Colt to get ingredients to kill Eve, as opposed to using it directly), and an unknown fifth being.