Melon King

Melon King enters the battlefield with X +1/+1 counters on it.
Indestructible, protection from everything
At the beginning of each upkeep, create a 0/1
blue and green Melon Mutant Squirrel creature
token for each +1/+1 counter on Melon King,
then if you control twenty or more Melon
Mutant Squirrels, you win the game.