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 - $164.937.500
Lightly Played - $131.950.000
Moderately Played - $115.456.200
Heavily Played - $98.962.500
Damaged - $82.468.700
Near Mint Spanish - $164.937.500
Lightly Played Spanish - $131.950.000
Moderately Played Spanish - $115.456.200
Heavily Played Spanish - $98.962.500
Damaged Spanish - $82.468.700