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 - $58.90
Lightly Played - $56.00
Moderately Played - $53.10
Heavily Played - $47.20
Damaged - $38.30
NM-Mint Non English - $58.90
Lightly Played Non English - $56.00
Moderately Played Non English - $53.10
Heavily Played Non English - $47.20
Damaged Non English - $38.30