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 - $120.20
NM-Mint Foil Non English - $120.20
Lightly Played Foil - $114.20
Lightly Played Foil Non English - $114.20
Moderately Played Foil - $108.20
Moderately Played Foil Non English - $108.20
Heavily Played Foil - $96.20
Heavily Played Foil Non English - $96.20
Damaged Foil - $78.20
Damaged Foil Non English - $78.20