The Ozolith is a rare Legendary Artifact card from Ikoria: Lair of Behemoths (IKO), collector number 237. Current market price: $63.08 (foil $64.00), TCGplayer market prices via Scryfall.
Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith. At the beginning of combat on your turn, if The Ozolith has counters on it, you may move all counters from The Ozolith onto target creature.