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 - £56.80
Lightly Played - £48.30
Moderately Played - £39.80
Heavily Played - £28.40
Damaged - £17.10
Near Mint Non English - £56.80
Lightly Played Non English - £48.30
Moderately Played Non English - £39.80
Heavily Played Non English - £28.40
Damaged Non English - £17.10