Mana Vault (769) [Secret Lair Drop]
$0.75
Secret Lair Drop
Artifact
mythic
{1}
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}.