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 - $69.30
Lightly Played - $55.50
Moderately Played - $48.60
Heavily Played - $41.60
Damaged - $34.70
Near Mint Spanish - $69.30
Lightly Played Spanish - $55.50
Moderately Played Spanish - $48.60
Heavily Played Spanish - $41.60
Damaged Spanish - $34.70