Fatalstorm, the Suffocator

Flying, Vigilance, Lifelink
Whenever you cast a blue, black, or white noncreature spell, you may gain life equal to that spells converted mana cost. If you don't, creatures your opponents control get -1/-0 until end of turn.
"This beast has all the makings of a worthy adversary, with the wind of a deadly one."
-Derik, Lone Ranger