Freelance Thug 4G
Creature - Rhino Warrior
Whenever Freelance Thug attacks or blocks, it gets +X/+X until end of turn, where X is the greatest power and/or toughness among other creatures you control. He never asks why, just the target, time and place.
Maybe he'd have trample if he used his horn and fists instead of that makeshift flamethrower with the wooden stock.