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 - $122.50
Lightly Played - $110.30
Moderately Played - $98.00
Heavily Played - $85.80
Damaged - $61.30
NM-Mint Non English - $122.50
Lightly Played Non English - $110.30
Moderately Played Non English - $98.00
Heavily Played Non English - $85.80
Damaged Non English - $61.30