Incendiary Cloud Spell
D&D Incendiary Cloud Spell Description: An incendiary cloud spell creates a cloud of roiling smoke shot through with white-hot embers. The smoke obscures all sight as a fog cloud does. In addition, the white-hot embers within the cloud deal 4d6 points of fire damage to everything within the cloud on your turn each round. All targets can make Reflex saves each round to take half damage.
More on the Dungeons & Dragons Incendiary Cloud Spell