Remembrance, the Astral Projector
Note This is the VERY GENERAL IDEA FOR A CHAMPION
He would have a projection (think shaco clone) with it's own abilities. At Level 1,6,11, and 16, he can refine the Projection to a specific role. He would have an item that makes the projection either free, like normal clones, controlled with alt+right click, or anchored to him, combining health bars.