Even tho, as The Panda pointed out, recolors can be accepted if they prove to be extremely useful (which I fear it's not the case in here as there's already a Nether Drake model doing this much more effective for a Nether Phoenix), this recolor is oversaturated and surely won't fit well with ladder resources.
If you were to tune the purple's both lightness and saturation down, it would be more impressive and look a lot better.
Still not sure would it be useful enough, as you can't recolor the flames via texture unless you mess the other textures up (which messes up some other effects up, causing domino effect) or the model itself.