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 - $72.800
Lightly Played - $58.200
Moderately Played - $51.000
Heavily Played - $43.700
Damaged - $36.400
Near Mint Spanish - $72.800
Lightly Played Spanish - $58.200
Moderately Played Spanish - $51.000
Heavily Played Spanish - $43.700
Damaged Spanish - $36.400