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 - $2,712.90
NM-Mint Non English - $2,712.90
Lightly Played - $2,577.30
Lightly Played Non English - $2,577.30
Moderately Played - $2,441.60
Moderately Played Non English - $2,441.60
Heavily Played - $2,170.40
Heavily Played Non English - $2,170.40
Damaged - $1,763.40
Damaged Non English - $1,763.40