Cauldron of Souls [Shadowmoor] Light of Destruction Set: EX: Emerald Type: Fire

Set: EX: Emerald Type: Fire Rarity: Uncommon Retreat cost: Colorless

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Set: HeartGold & SoulSilver: Call of Legends Type: Metal Rarity: Promo

This effect can't reduce the mana in that cost to less than one mana

Special Summon that monster

Cauldron of Souls [Shadowmoor] Light of Destruction Set: EX: Emerald Type: FireSet: Shadowmoor Type: Artifact Rarity: Rare Cost: {5} {T}: Choose any number of target creatures. Each of those creatures gains persist until end of turn. (When it dies, if it had no 1 1 counters on it, return it to the battlefield under its owner's control with a 1 1 counter on it.)