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 - $6,808.10
Lightly Played - $5,446.50
Moderately Played - $4,765.70
Heavily Played - $4,084.90
Damaged - $3,404.10
Near Mint Spanish - $6,808.10
Lightly Played Spanish - $5,446.50
Moderately Played Spanish - $4,765.70
Heavily Played Spanish - $4,084.90
Damaged Spanish - $3,404.10