unforuntately the spell isnt the source of the damage. All the spell does is fill the font with fire type terrain. Which will deal 12 damage to every enemy occupying it at the start of their turn
An even closer comparison would be Open the Earth. The IS bonus reduces the 8 damage dealt by the spell, but not the 4 damage dealt by the terrain. In the case of Fiery Ambush, all the damage is dealt by terrain.
Comments on Profile Post by nepyonisdead