There is a place between dimensions, between worlds. To some it is known as the Outside, to others it is the Unknown. To most, however, it is called the Void. Despite its name, the Void is not an empty place, but rather the home of unspeakable things, horrors not meant for minds of men. Though such knowledge is lost to the modern day, there are those who have unwittingly discovered what lies beyond and have been unable to turn away. Kassadin is such a creature, a man once forced to look upon the face of the Void and who was forever changed by it. Once a seeker of forbidden knowledge, he discovered that what he sought was something else entirely. Though a part of him died that day, he knows that he must protect Valoran from the things scratching at the door, waiting to get in and visit their torments upon the world. They are only one step away, something to which the appearance of the abomination known as Cho'gath attests.

''If you look upon the Void, you can't put it behind you. If you look upon Kassadin, he is probably already there.''