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 - $66.00
Near Mint Non-English - $66.00
Lightly Played - $62.75
Lightly Played Non-English - $62.75
Moderately Played - $52.75
Moderately Played Non-English - $52.75
Heavily Played - $39.75
Heavily Played Non-English - $39.75
Damaged - $33.00
Damaged Non-English - $33.00