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 Foil - $846.90
Lightly Played Foil - $762.20
Moderately Played Foil - $677.50
Heavily Played Foil - $592.80
Damaged Foil - $423.50
NM-Mint Foil Non English - $846.90
Lightly Played Foil Non English - $762.20
Moderately Played Foil Non English - $677.50
Heavily Played Foil Non English - $592.80
Damaged Foil Non English - $423.50