The Chaos Heart
The Chaos Heart is the powerful, magical item in the Wii game Super Paper Mario that is summoned by the union of a great king and a beautiful princess. As it is stated the great king (Bowser) and the beautiful princess (Peach) must marry to bring it into the world.
It is summoned to bring forth the Void, which gradually will end all worlds.
Dimentio steals the Chaos Heart after the defeat of Count Bleck, and uses Luigi to host its power, creating Super Dimentio.
After Dimentio is defeated by Mario and Co., Count Bleck and Tippi sacrifice themselves using their love through the Pure Hearts to stop the Chaos Heart, resulting in the closure of the Void and the restoration of all destroyed worlds.
Trivia
- It was mentioned by the dangerous magic book known as the Dark Prognosticus.