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 - $83.70
Lightly Played - $67.00
Moderately Played - $58.60
Heavily Played - $50.20
Damaged - $41.90
Near Mint Spanish - $83.70
Lightly Played Spanish - $67.00
Moderately Played Spanish - $58.60
Heavily Played Spanish - $50.20
Damaged Spanish - $41.90