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 - $44.600
Lightly Played - $35.700
Moderately Played - $31.200
Heavily Played - $26.800
Damaged - $22.300
Near Mint Spanish - $44.600
Lightly Played Spanish - $35.700
Moderately Played Spanish - $31.200
Heavily Played Spanish - $26.800
Damaged Spanish - $22.300