Forest Smasher

You must spend at least 1 {g} in order to cast
Forest Smasher.
Trample
Forest Smasher enters the battlefield with X
+1/+1 counters on it. If X is 5 or more, double
the number of counters on it. If X is 10 or more,
creatures you control get +X/+X and gain haste
until end of turn.