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 - $64.00
Near Mint Non-English - $64.00
Lightly Played - $60.75
Lightly Played Non-English - $60.75
Moderately Played - $51.25
Moderately Played Non-English - $51.25
Heavily Played - $38.50
Heavily Played Non-English - $38.50
Damaged - $32.00
Damaged Non-English - $32.00