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 - $85.100
Lightly Played - $68.100
Moderately Played - $59.600
Heavily Played - $51.100
Damaged - $42.600
Near Mint Spanish - $85.100
Lightly Played Spanish - $68.100
Moderately Played Spanish - $59.600
Heavily Played Spanish - $51.100
Damaged Spanish - $42.600