Mana Vault does not untap during your untap phase. If it remains tapped during your upkeep, Mana Vault deals 1 damage to you.4: Untap Mana Vault. Use this ability only during your upkeep.T: Add three colorless mana to your mana pool. Play these additions as interrupts.
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Rarity:R
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#:352
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Card Type:Artifact
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Casting Cost: 1
