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 - $188.10
Lightly Played - $150.50
Moderately Played - $131.70
Heavily Played - $112.90
Damaged - $94.10
Near Mint Spanish - $188.10
Lightly Played Spanish - $150.50
Moderately Played Spanish - $131.70
Heavily Played Spanish - $112.90
Damaged Spanish - $94.10