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 - $75.00
Near Mint Non English - $75.00
Lightly Played - $71.25
Lightly Played Non English - $71.25
Moderately Played - $63.75
Moderately Played Non English - $63.75
Heavily Played - $56.25
Heavily Played Non English - $56.25
Damaged - $45.00
Damaged Non English - $45.00