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 - $97.80
Lightly Played - $78.30
Moderately Played - $68.50
Heavily Played - $58.70
Damaged - $48.90
Near Mint Spanish - $97.80
Lightly Played Spanish - $78.30
Moderately Played Spanish - $68.50
Heavily Played Spanish - $58.70
Damaged Spanish - $48.90