Shi Shao, the Worldrender

Flying, haste, protection from blue
Hubris (Whenever this creature deals lethal damage to another creature, put a +1/+1 counter on it.)
At the beginning of your upkeep, if Shi Shao, the Worldrender did not deal damage since the beginning of your last turn, sacrifice it. It deals damage equal to its power to each other creature and each planeswalker.