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 - $10,889.10
Lightly Played - $8,711.30
Moderately Played - $7,622.40
Heavily Played - $6,533.50
Damaged - $5,444.60
Near Mint Spanish - $10,889.10
Lightly Played Spanish - $8,711.30
Moderately Played Spanish - $7,622.40
Heavily Played Spanish - $6,533.50
Damaged Spanish - $5,444.60