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 - $189.10
Lightly Played - $151.30
Moderately Played - $132.40
Heavily Played - $113.50
Damaged - $94.60
Near Mint Spanish - $189.10
Lightly Played Spanish - $151.30
Moderately Played Spanish - $132.40
Heavily Played Spanish - $113.50
Damaged Spanish - $94.60