Mordant Dragon is a rare Creature — Dragon card from Worldwake (WWK), collector number 85. Current market price: $0.55 (foil $0.45), TCGplayer market prices via Scryfall.
Flying {1}{R}: This creature gets +1/+0 until end of turn. Whenever this creature deals combat damage to a player, you may have it deal that much damage to target creature that player controls.