We need a tank Champion (LITERALLY)
No, I'm not talking about something like Braum. I'm talking about this!
http://www.worldwar2aces.com/tiger-tank/tiger-tank.jpg
This is a Tiger I, one of Germany's most powerful heavy tanks of WWII. Weighs around 57 tonnes, has up to 120mm of frontal armor, can reach 42 km/h, and is armed with a lethal 88mm cannon. Scared the f*ck out of a lot of soldiers in the war, and for good reason. If you were in an M4 Sherman, odds are you were SCREWED against a Tiger.
Now what if we could get something like this in League? How would it work? Say it was a tank made by the same team that made Corki's ROFL-copter, and that the tank was meant for Yordles. That'd be pretty kickass, huh?