This would also help explain why Nimue can’t kill Merlin and instead turns him into a tree.
Actually, that makes a lot of sense to me. If they keep with Arthurian legend at all (which we really have no reason to believe they will, but whatever), Vortigan and Merlin go way back, to when Merlin was a boy. Vortigan was originally told to sacrifice Merlin (well, not Merlin as such, but a boy with Merlin’s particular parentage) in order to keep the castle he was trying to build from collapsing. Since they like to merge different legends together, maybe castle = Camelot, and V was the claimant to the throne to Camelot before Arthur. Or something.
[adrotate group="5"]