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 - $1.00
Lightly Played - $0.95
Moderately Played - $0.85
Heavily Played - $0.75
Damaged - $0.60
NM-Mint Non English - $1.00
Lightly Played Non English - $0.95
Moderately Played Non English - $0.85
Heavily Played Non English - $0.75
Damaged Non English - $0.60