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 - $175.90
Lightly Played - $140.70
Moderately Played - $123.20
Heavily Played - $105.60
Damaged - $88.00
Near Mint Spanish - $175.90
Lightly Played Spanish - $140.70
Moderately Played Spanish - $123.20
Heavily Played Spanish - $105.60
Damaged Spanish - $88.00