Blood Leviathan

Indestructible, hexproof, protection from black and red. This creature cannot be played unless a card named Devil's Son is in a graveyard. When this creature enters the battlefield, all other permanents become black and red. Any spell played is black and red as long as Blood Leviathan is on the battlefield.
"Something went wrong with the crossing. It's like Hell is coming here, as if the mere presence of this creature has brought Hell on Earth. What kind of a being can do such a thing?" -Victoria Swa