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 - $55.900
Lightly Played - $44.800
Moderately Played - $39.200
Heavily Played - $33.600
Damaged - $28.000
Near Mint Spanish - $55.900
Lightly Played Spanish - $44.800
Moderately Played Spanish - $39.200
Heavily Played Spanish - $33.600
Damaged Spanish - $28.000