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 - $49.500
Lightly Played - $39.600
Moderately Played - $34.700
Heavily Played - $29.700
Damaged - $24.800
Near Mint Spanish - $49.500
Lightly Played Spanish - $39.600
Moderately Played Spanish - $34.700
Heavily Played Spanish - $29.700
Damaged Spanish - $24.800