Terror of the Peaks is a mythic Creature — Dragon card from Outlaws of Thunder Junction (OTJ), collector number 337. Current market price: $51.55 (foil $54.30), 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.