Selesnya Ascendancy

{3}{g}{w}: Create a 1/1 white Soldier creature token
with lifelink.
Whenever you create one or more creature
tokens, put that many harmony counters on
Selesnya Ascendancy.
At the beginning of your upkeep, if Selesnya Ascendancy has 40 or more harmony counters
on it, you win the game.