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 - $110.90
Lightly Played - $88.70
Moderately Played - $77.70
Heavily Played - $66.60
Damaged - $55.50
Near Mint Spanish - $110.90
Lightly Played Spanish - $88.70
Moderately Played Spanish - $77.70
Heavily Played Spanish - $66.60
Damaged Spanish - $55.50