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 - $81.30
Lightly Played - $65.00
Moderately Played - $56.90
Heavily Played - $48.80
Damaged - $40.70
Near Mint Spanish - $81.30
Lightly Played Spanish - $65.00
Moderately Played Spanish - $56.90
Heavily Played Spanish - $48.80
Damaged Spanish - $40.70