Mana Vault [Secret Lair Drop Series]

Set: Secret Lair Drop Series Type: Artifact Rarity: Mythic Cost: {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}.