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 - $98.50
Lightly Played - $93.60
Moderately Played - $88.60
Heavily Played - $78.80
Damaged - $64.00
NM-Mint Non English - $98.50
Lightly Played Non English - $93.60
Moderately Played Non English - $88.60
Heavily Played Non English - $78.80
Damaged Non English - $64.00