Anya, Merciless Angel is a mythic Legendary Creature — Angel card from Commander 2015 (C15), collector number 41. Current market price: $1.45, TCGplayer market prices via Scryfall.
Flying Anya gets +3/+3 for each opponent whose life total is less than half their starting life total. As long as an opponent's life total is less than half their starting life total, Anya has indestructible.