Alphaer, Awoken Spark

+2: Destroy target permanent with converted mana cost 5 or less. You gain life equal to that cards converted mana cost.
-3: Until your next turn, Alphaer, Awoken Spark becomes a creature with reach and power and toughness equal to the number of lands in play.
-10: Destroy all non-land permanents opponents controls. You gain life equal to the number of permanents destroyed this way.