Grimace, the Yawning Chasm

Defender, McWither
Grimace can Block any number of creatures
McVoid - At the beginning of your end step add +0/+1 counters onto Grimace equal to the number of
McWither counters on creatures your opponents control. If that number is more than 6, add a shroud counter to Grimace.
If that number is more than 10 add an indestructible counter to Grimace. If that number is more than twenty, you win the game.