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 - $65.70
Lightly Played - $52.50
Moderately Played - $46.00
Heavily Played - $39.40
Damaged - $32.90
Near Mint Spanish - $65.70
Lightly Played Spanish - $52.50
Moderately Played Spanish - $46.00
Heavily Played Spanish - $39.40
Damaged Spanish - $32.90