Roon of the Hidden Realm is a rare Legendary Creature — Rhino Soldier card from Double Masters 2022 (2X2), collector number 270. Current market price: $0.35 (foil $0.45), TCGplayer market prices via Scryfall.
Vigilance, trample {2}, {T}: Exile another target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.