Terror of the Peaks [Core Set 2021] Unlimited Edition if you have the proper

if you have the proper permit

If those permanents are exchanged this way

Set: Mystery Booster Type: Creature — Elf Druid Rarity: Rare Cost: {1}{G} {T}: For each color among permanents you control

"And topples round the dreary west A looming bastion fringed with fire

Terror of the Peaks [Core Set 2021] Unlimited Edition if you have the properSet: Core Set 2021 Type: Creature Dragon Rarity: Mythic Cost: {3}{R}{R} Flying Spells your opponents cast that target Terror of the Peaks cost an additional 3 life to cast. Whenever another creature enters the battlefield under your control, Terror of the Peaks deals damage equal to that creature's power to any target.