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 - $48.600
Lightly Played - $38.900
Moderately Played - $34.000
Heavily Played - $29.200
Damaged - $24.300
Near Mint Spanish - $48.600
Lightly Played Spanish - $38.900
Moderately Played Spanish - $34.000
Heavily Played Spanish - $29.200
Damaged Spanish - $24.300