Idol of Endurance is a rare Artifact card from Core Set 2021 (M21), collector number 23. Current market price: $0.19 (foil $0.30), TCGplayer market prices via Scryfall.
When this artifact enters, exile all creature cards with mana value 3 or less from your graveyard until this artifact leaves the battlefield. {1}{W}, {T}: Until end of turn, you may cast a creature spell from among cards exiled with this artifact without paying its mana cost.