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 - $178.200
Lightly Played - $142.600
Moderately Played - $124.800
Heavily Played - $107.000
Damaged - $89.100
Near Mint Spanish - $178.200
Lightly Played Spanish - $142.600
Moderately Played Spanish - $124.800
Heavily Played Spanish - $107.000
Damaged Spanish - $89.100