Aethris, Void's Light

Flying, vigilance, lifelink, deathtouch
Whenever an opponents cast his or her first colorless spell each turn, counter that spell.
Whenever you cast your first white spell each turn, you gain 2 life.
Whenever you cast your first black spell each turn, target creature gets -2/-2 until end of turn.
Colorless creatures get -1/-1.
"For the banishment of the Eldrazi, I will keep watch over the void."