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 - $54.60
Lightly Played - $51.90
Moderately Played - $49.10
Heavily Played - $43.70
Damaged - $35.50
NM-Mint Non English - $54.60
Lightly Played Non English - $51.90
Moderately Played Non English - $49.10
Heavily Played Non English - $43.70
Damaged Non English - $35.50