Ethereal Benefactor

Flying
Auracycling {1}{g}{w} ({1}{g}{w}, Discard this card: Search your library for an Aura card with the same converted mana cost as this card, reveal it, and put it into your hand. Then shuffle your library.)
Whenever a spell or ability an opponent controls destroys an Aura you control, you may return Ethereal Benefactor from your graveyard to your hand.