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 - $311,900
Lightly Played - $249,500
Moderately Played - $218,300
Heavily Played - $187,200
Damaged - $156,000
Near Mint Spanish - $311,900
Lightly Played Spanish - $249,500
Moderately Played Spanish - $218,300
Heavily Played Spanish - $187,200
Damaged Spanish - $156,000