End of the World

End of the World is a by-product of all Heartless's destructive nature. Although End of the World is the last world, the Heartless are not very numerous as compared to Hollow Bastion, but they are very powerful. Upon taking a world's heart, a tiny fragment of what is left of that world is sent drifting through the void of space until it eventually meets and merges with End of the World. It is, in essence, a Heartless of the destroyed worlds, as well as the way to reach the Endless Abyss, where Kingdom Hearts is, once the Final Keyhole is unsealed. In nature, it can be seen as the opposite of The World That Never Was, which is a similar artificial "Nobody" world without its own heart.