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 - $67.90
Lightly Played - $64.50
Moderately Played - $61.10
Heavily Played - $54.30
Damaged - $44.10
NM-Mint Non English - $67.90
Lightly Played Non English - $64.50
Moderately Played Non English - $61.10
Heavily Played Non English - $54.30
Damaged Non English - $44.10