Originally posted by Mr. Tibbs
He was immortal as long as he did not look at his painting. If he had not looked at it at the end, he would have lived.This is why I said the Avengers cannot destroy him unless they have his painting.
Correction he healed from damage and was immune to aging so long as he didn't look at the painting, you have no proof that he'd survive being beheaded or having his head smashed like a melon by a Mjolnir strike.