I think it's a pity that there isn't a champion that has powers based on Illusions. I thought of this before and it's kinda sad because it would be fun.
The illusions could be something like creating a monster or just an image, and it would do damage, or it also could put something over your champion(a creature or a shadow, wtv) and do damage over time.
I don't know but I would love to see a champion with powers based on Illusions.