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 - $85.10
Lightly Played - $68.10
Moderately Played - $59.60
Heavily Played - $51.10
Damaged - $42.60
Near Mint Spanish - $85.10
Lightly Played Spanish - $68.10
Moderately Played Spanish - $59.60
Heavily Played Spanish - $51.10
Damaged Spanish - $42.60