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}.
NM-Mint - $68.90
Lightly Played - $65.50
Moderately Played - $62.00
Heavily Played - $55.10
Damaged - $44.80
NM-Mint Non English - $68.90
Lightly Played Non English - $65.50
Moderately Played Non English - $62.00
Heavily Played Non English - $55.10
Damaged Non English - $44.80