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 - $186.80
Lightly Played - $168.10
Moderately Played - $149.50
Heavily Played - $130.80
Damaged - $93.40
NM-Mint Non English - $186.80
Lightly Played Non English - $168.10
Moderately Played Non English - $149.50
Heavily Played Non English - $130.80
Damaged Non English - $93.40