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 - $1,344.50
Lightly Played - $1,075.60
Moderately Played - $941.20
Heavily Played - $806.70
Damaged - $672.30
Near Mint Spanish - $1,344.50
Lightly Played Spanish - $1,075.60
Moderately Played Spanish - $941.20
Heavily Played Spanish - $806.70
Damaged Spanish - $672.30