Terror of the Peaks is a mythic Creature — Dragon card from Outlaws of Thunder Junction (OTJ), collector number 149. Current market price: $29.04 (foil $34.27), TCGplayer market prices via Scryfall.
Flying Spells your opponents cast that target this creature cost an additional 3 life to cast. Whenever another creature you control enters, this creature deals damage equal to that creature's power to any target.