Mana Vault [Ultimate Box Topper] Treasure Nest Vanguard gives you the chance

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Mana Vault [Ultimate Box Topper] Treasure Nest Vanguard gives you the chanceSet: Ultimate Box Topper Type: Artifact 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}.