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 - $62.25
Lightly Played - $59.00
Moderately Played - $49.75
Heavily Played - $37.25
Damaged - $31.25
Near Mint Non-English - $62.25
Lightly Played Non-English - $59.00
Moderately Played Non-English - $49.75
Heavily Played Non-English - $37.25
Damaged Non-English - $31.25