Calamity of Cinders is a rare Sorcery card from Bloomburrow Commander (BLC), collector number 57. Current market price: $0.45, TCGplayer market prices via Scryfall.
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.