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 - $66.50
Lightly Played - $63.10
Moderately Played - $59.80
Heavily Played - $53.20
Damaged - $43.20
NM-Mint Non English - $66.50
Lightly Played Non English - $63.10
Moderately Played Non English - $59.80
Heavily Played Non English - $53.20
Damaged Non English - $43.20