Japanese Pokmon cards often hold higher value because several concrete factors work together
Vault 12: The Necropolis Wasteland Raider Acquired Mutation Assaultron Dominator Bottle-Cap Blast Crimson Caravaneer Duchess, Wayward Tavernkeep Grim Reaper's Sprint Ian the Reckless Junk Jet Megaton's Fate The Motherlode, Excavator Mysterious Stranger Plasma Caster Powder Ganger Rose, Cutthroat Raider Synth Eradicator Thrill-Kill Disciple Vault 21: House Gambit Veronica, Dissident Scribe Wild Wasteland
Keep in mind that this is counting both the Universes Beyond Stranger Things cards and their in-Magic universe versions printed in Streets of New Capenna as the same card.
It has unearth for seven generic mana, but thanks to Kotiss ability, you can cast it for its regular four mana and not have to exile it at the end of your turn
Its a discounted mode of casting that gives you the same permanent for the turn, but, should it survive the turn, its exiled at the end step