Final Grunt

Indestructible
Whenever Final Grunt deals combat damage to a player, that player loses the game.
"Okay look, if you let me live, I got the Fist of Rukt. Look, I'll be at the bottom. I'll polish your boots. I'll polish your helmet! It's the gas, haha! When I'm on the gas, I don't know what I'm doing half the time!" - The God Damned Final Grunt