Lumox, Protector of the Aria

Vigilance, Lifelink, you gain Hexproof.
{w}{w},{t}: Counter target spell or ability that targets a permanent you control. Exile that spell or the source of that ability.
When a card an opponent controls is exiled, put a +1/+1 counter on Lumox.
"The Aria shall purify this world. I shall make sure they do."