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 - $93,140,000
Lightly Played - $88,480,000
Moderately Played - $79,170,000
Heavily Played - $69,850,000
Damaged - $65,200,000
Near Mint Spanish - $93,140,000
Lightly Played Spanish - $88,480,000
Moderately Played Spanish - $79,170,000
Heavily Played Spanish - $69,850,000
Damaged Spanish - $65,200,000