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 - $111.40
Lightly Played - $89.10
Moderately Played - $78.00
Heavily Played - $66.90
Damaged - $55.70
Near Mint Spanish - $111.40
Lightly Played Spanish - $89.10
Moderately Played Spanish - $78.00
Heavily Played Spanish - $66.90
Damaged Spanish - $55.70