Seems like this guy was just a random nobody meant to throw us off. Nimue said he was “just a man”, so did he not have magic? Yet he managed to destroy entire towns all by himself? How in the world did he know about the Holy Grail and manage to follow Merlin and Nimue around?
He was a random nobody. An object to give Nimue an impetus. That is all.
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"He was a lot of things to me" "The only conclusion was love"