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 - $98.000
Lightly Played - $78.400
Moderately Played - $68.600
Heavily Played - $58.800
Damaged - $49.000
Near Mint Spanish - $98.000
Lightly Played Spanish - $78.400
Moderately Played Spanish - $68.600
Heavily Played Spanish - $58.800
Damaged Spanish - $49.000