Terror of the Peaks is a mythic Creature — Dragon card from Core Set 2021 (M21), collector number 369. Current market price: $54.32 (foil $90.84), 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.