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 - $111.700
Lightly Played - $89.400
Moderately Played - $78.200
Heavily Played - $67.000
Damaged - $55.900
Near Mint Spanish - $111.700
Lightly Played Spanish - $89.400
Moderately Played Spanish - $78.200
Heavily Played Spanish - $67.000
Damaged Spanish - $55.900