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 - $80.900
Lightly Played - $64.800
Moderately Played - $56.700
Heavily Played - $48.600
Damaged - $40.500
Near Mint Spanish - $80.900
Lightly Played Spanish - $64.800
Moderately Played Spanish - $56.700
Heavily Played Spanish - $48.600
Damaged Spanish - $40.500