What if you created a tank-support champion that could be attacked by allies?
I'm not saying "LOL TEAM KILL REPORTED LOL." No, not one bit. He wouldn't actually get DAMAGED or CC'd by the allies. I'm talking about some sort of champion that allows champions to wind up their abilities from afar before going into combat. Maybe in his lore, you could make him some sort of trainer that carries around a punching bag or something! Yeah that's dumb, but I'm sure you guys could make something of it.
I'm sure

could easily find a way to take good advantage of a champ like this!
Actually, not
. Let's not take things too far.