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}.
Near Mint - $81.00
Lightly Played - $72.90
Moderately Played - $64.80
Heavily Played - $52.70
Damaged - $36.50
Near Mint French - $81.00
Lightly Played French - $72.90
Moderately Played French - $64.80
Heavily Played French - $52.70
Damaged French - $36.50