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 - $111.10
Lightly Played Foil - $100.00
Moderately Played Foil - $88.90
Heavily Played Foil - $77.80
Damaged Foil - $55.60
NM-Mint Foil Non English - $111.10
Lightly Played Foil Non English - $100.00
Moderately Played Foil Non English - $88.90
Heavily Played Foil Non English - $77.80
Damaged Foil Non English - $55.60