Your Not So Ordinary Villain

A millennium had passed, and everything had lost its meaning in his eyes. Many heroes emerged from generation to generation, but he stood the test of time. That was his life, waiting for someone to come along and defeat him, but no one did. Nobody dared. Nobody tried.

How can he allow this to happen? With the aid of his magic, he rose from his throne and set out into another world in search of excitement and, perhaps, a worthwhile adventure.

What would happen if this last boss decided to venture into the human world for fun?