Daxos's Torment is a rare Enchantment card from Commander 2015 (C15), collector number 18. Current market price: $0.33, TCGplayer market prices via Scryfall.
Constellation — Whenever this enchantment or another enchantment you control enters, this enchantment becomes a 5/5 Demon creature with flying and haste in addition to its other types until end of turn.