Mana Vault doesn't untap during your untap step. At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault. At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you. {T}: Add {C}{C}{C}.
Near Mint - $84.40
Lightly Played - $67.50
Moderately Played - $59.10
Heavily Played - $50.70
Damaged - $42.20
Near Mint Spanish - $84.40
Lightly Played Spanish - $67.50
Moderately Played Spanish - $59.10
Heavily Played Spanish - $50.70
Damaged Spanish - $42.20