Mana Vault is a mythic Artifact card from Double Masters 2022 (2X2), collector number 308. Current market price: $111.96 (foil $154.46), TCGplayer market prices via Scryfall.
This artifact doesn't untap during your untap step. At the beginning of your upkeep, you may pay {4}. If you do, untap this artifact. At the beginning of your draw step, if this artifact is tapped, it deals 1 damage to you. {T}: Add {C}{C}{C}.