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}.
NM-Mint - $97.80
Lightly Played - $88.00
Moderately Played - $78.20
Heavily Played - $68.50
Damaged - $48.90
NM-Mint Non English - $97.80
Lightly Played Non English - $88.00
Moderately Played Non English - $78.20
Heavily Played Non English - $68.50
Damaged Non English - $48.90