Master of Earth
'Nother champion idea: A support who (much like an earthbender from Avatar: the last airbender) can control earth and rocks and such.
I thought of this idea primarily because of my idea for his/her ult (and the fact that I imagine him/her as sort of modeled after Long from the Bloody Roar series, a very proper martial artist with a fancy silk robe). His/her ult would be a wave of Earth that ripples forward from the ground. Now here's the twist: it would knock her allies airborne. See, being knocked airborne has traditionally been a bad thing, a form of crowd control. But what if there was a champion who could use it in a positive way? Perhaps by doing this he/she could set their allies up for some plays, or save them from dying if the wave made them jump backwards. Maybe being knocked skyward would render them invincible for a short time, long enough to avoid some major damage and put his/her team in an advantageous position.