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 - $57.20
Lightly Played - $45.80
Moderately Played - $40.00
Heavily Played - $34.30
Damaged - $28.60
Near Mint Spanish - $57.20
Lightly Played Spanish - $45.80
Moderately Played Spanish - $40.00
Heavily Played Spanish - $34.30
Damaged Spanish - $28.60