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 - $175.900
Lightly Played - $140.700
Moderately Played - $123.200
Heavily Played - $105.600
Damaged - $88.000
Near Mint Spanish - $175.900
Lightly Played Spanish - $140.700
Moderately Played Spanish - $123.200
Heavily Played Spanish - $105.600
Damaged Spanish - $88.000