Dragonlord Silumgar is a mythic Legendary Creature — Elder Dragon card from Dragons of Tarkir (DTK), collector number 220. Current market price: $4.12 (foil $17.07), TCGplayer market prices via Scryfall.
Flying, deathtouch When Dragonlord Silumgar enters, gain control of target creature or planeswalker for as long as you control Dragonlord Silumgar.