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 - $54,550,000
Lightly Played - $51,830,000
Moderately Played - $46,370,000
Heavily Played - $40,920,000
Damaged - $38,190,000
Near Mint Spanish - $54,550,000
Lightly Played Spanish - $51,830,000
Moderately Played Spanish - $46,370,000
Heavily Played Spanish - $40,920,000
Damaged Spanish - $38,190,000