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 - $1,930.50
Lightly Played - $1,544.40
Moderately Played - $1,351.40
Heavily Played - $1,158.30
Damaged - $965.30
Near Mint Spanish - $1,930.50
Lightly Played Spanish - $1,544.40
Moderately Played Spanish - $1,351.40
Heavily Played Spanish - $1,158.30
Damaged Spanish - $965.30