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 - $52.300
Lightly Played - $41.800
Moderately Played - $36.600
Heavily Played - $31.400
Damaged - $26.200
Near Mint Spanish - $52.300
Lightly Played Spanish - $41.800
Moderately Played Spanish - $36.600
Heavily Played Spanish - $31.400
Damaged Spanish - $26.200