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 - $94.70
Lightly Played - $75.80
Moderately Played - $66.30
Heavily Played - $56.90
Damaged - $47.40
Near Mint Spanish - $94.70
Lightly Played Spanish - $75.80
Moderately Played Spanish - $66.30
Heavily Played Spanish - $56.90
Damaged Spanish - $47.40