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 - $949.00
Lightly Played Foil - $901.60
Moderately Played Foil - $854.10
Heavily Played Foil - $759.20
Damaged Foil - $616.90
NM-Mint Foil Non English - $949.00
Lightly Played Foil Non English - $901.60
Moderately Played Foil Non English - $854.10
Heavily Played Foil Non English - $759.20
Damaged Foil Non English - $616.90