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 - $79.700
Lightly Played - $63.800
Moderately Played - $55.800
Heavily Played - $47.800
Damaged - $39.900
Near Mint Spanish - $79.700
Lightly Played Spanish - $63.800
Moderately Played Spanish - $55.800
Heavily Played Spanish - $47.800
Damaged Spanish - $39.900