Storm, Mother Nature's Child

Flying
At the beginning of combat, put a Cyclone
counter on Storm. Then, you may remove any
number of Cyclone counters from Storm. If you
do, Storm deals X damage to each creature with
flying your opponent's control and Storm gets
+X/+X until end of turn, where X is how many Cyclone counters were removed from Storm.
Those creatures cannot block Storm this turn.