Self-Fulfilling Prophecy

If faced with eliminating a monstrous threat to the world, would you do it? Of course, you would, who wouldn't? To be worshipped among man as a champion, a hero, a god; you'd have to be insane not to, but, it's never really that simple, is it? How can one possibly kill the devil, without taking on his mantle?

(1,500 word #battlethebeast contest)