Clown is a creature of destruction.

Everything he touches rots from the inside out. The world hoped Clown still being alive was an April Fools' prank, but he walked the planet and stared at the human race, wondering if there was a decent one in the entire collection of 8 billion. If there is not, he will call an army of clowns from the other dimension to wage war on them all. It is a war the clowns cannot lose. The post Apocalyptic Earth will become their circus and they will perform on the broken rubble of society long after the people are gone.