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 - $92.100
Lightly Played - $73.700
Moderately Played - $64.500
Heavily Played - $55.300
Damaged - $46.100
Near Mint Spanish - $92.100
Lightly Played Spanish - $73.700
Moderately Played Spanish - $64.500
Heavily Played Spanish - $55.300
Damaged Spanish - $46.100