Gelatinous Cube is a rare Creature — Ooze card from Adventures in the Forgotten Realms (AFR), collector number 105. Current market price: $0.34 (foil $0.34), TCGplayer market prices via Scryfall.
Engulf — When this creature enters, exile target non-Ooze creature an opponent controls until this creature leaves the battlefield. Dissolve — {X}{B}: Put target creature card with mana value X exiled with this creature into its owner's graveyard.