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 - $65.30
Lightly Played - $62.00
Moderately Played - $58.80
Heavily Played - $52.20
Damaged - $39.20
Near Mint Non English - $65.30
Lightly Played Non English - $62.00
Moderately Played Non English - $58.80
Heavily Played Non English - $52.20
Damaged Non English - $39.20