From the first glimpse at the icon, it looks like a wood, dretched in blood aura.
The figure of the man, raising his hands needs a lot more of definition, and you should reconsider of working out a new position for the figure: it looks like it's casting the flames, victim version would, probably, cover the face or try to block/duck.
I'm not sure if brown-ish smudges on the edges are two more figures, or background visible through flame invasion - those parts need harsher shadows or definition of humanoid body figures.
The color is bland. Even thought Warcraft artists mainly use two colors for shape icons (like Flame Strike or Reincarnation), the flames must have color variations to make it look burning (red -> orange -> yellow -> white), or you will end up with a splash of something that heavily looks like blood.