Dragonlord Kolaghan is a mythic Legendary Creature — Elder Dragon card from Dragons of Tarkir (DTK), collector number 218. Current market price: $11.55 (foil $15.71), TCGplayer market prices via Scryfall.
Flying, haste Other creatures you control have haste. Whenever an opponent casts a creature or planeswalker spell with the same name as a card in their graveyard, that player loses 10 life.