"Years ago, there lived a selfish, relentless brute whose only goal was to become the strongest lifeform on the planet. However, he knew there were other beings whose strength would greatly surpass his, no matter how hard he trained. So he realized the only way he could truly become the strongest on the planet was to slay anyone or anything that was or could be capable of defeating him, now or later on, whether by ambush or head-on combat. Obviously, the stronger beings did not appreciate such an idea of wiping so many innocent lifeforms off the Earth, so they sealed him in the center of the heaviest mountain. And should he ever escape, the stronger beings enlisted a foe of equivalent power to duel him for as long as the brute has the energy. And that guardian's name... is Guy W. Mustache."
That was too hard of a hit. 50% power. Which means now, it's your turn.