Eye of the Swarm

When Eye of the Swarm enters the battlefield,
put 8 1/1 Eldrazi Scion creature tokens onto the
battlefield under your control.
Whenever an eldrazi you control attacks, put a
+1/+1 counter on it.
At the beginning of your end step, if you control
8 or more eldrazi creatures with power 8 or
greater, you win the game.