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 - $74.30
Lightly Played - $59.40
Moderately Played - $52.00
Heavily Played - $44.60
Damaged - $37.20
Near Mint Spanish - $74.30
Lightly Played Spanish - $59.40
Moderately Played Spanish - $52.00
Heavily Played Spanish - $44.60
Damaged Spanish - $37.20