{R} Calamity of Cinders [Bloomburrow Commander][BLC 023]

Title
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Set: Bloomburrow Commander
Type: Sorcery
Rarity: Rare
Cost: {5}{R}{R}
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Calamity of Cinders deals 6 damage to each untapped creature.