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 - $60.40
Lightly Played - $48.40
Moderately Played - $42.30
Heavily Played - $36.30
Damaged - $30.20
Near Mint Spanish - $60.40
Lightly Played Spanish - $48.40
Moderately Played Spanish - $42.30
Heavily Played Spanish - $36.30
Damaged Spanish - $30.20