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 - $173.30
Lightly Played - $138.60
Moderately Played - $121.30
Heavily Played - $104.00
Damaged - $86.70
Near Mint Spanish - $173.30
Lightly Played Spanish - $138.60
Moderately Played Spanish - $121.30
Heavily Played Spanish - $104.00
Damaged Spanish - $86.70