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 - $54.500
Lightly Played - $43.600
Moderately Played - $38.200
Heavily Played - $32.700
Damaged - $27.300
Near Mint Spanish - $54.500
Lightly Played Spanish - $43.600
Moderately Played Spanish - $38.200
Heavily Played Spanish - $32.700
Damaged Spanish - $27.300