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 - $113.90
Lightly Played - $91.10
Moderately Played - $79.70
Heavily Played - $68.30
Damaged - $57.00
Near Mint Spanish - $113.90
Lightly Played Spanish - $91.10
Moderately Played Spanish - $79.70
Heavily Played Spanish - $68.30
Damaged Spanish - $57.00