Done about a week ago for conceptart.org's creature of the week. Topic: firestarter. guh.
not particularly detailed or inspired, but I just love snakey things, I guess here's the description for it.

Firestarters are small, reclusive, and rather tempermental creatures, considered both a bane and blessing of the common household. They find their way into people's homes, most often during the winter, and make a permanent nest in the fireplace. A Firestarter never has to leave once they move in, because all they ever eat is hot ash, and the home owner is careful to feed wood/paper into the lair for burning now and then, lest it come out in search of fuel aroud the house. The black spots on it's translucent skin are created from the ash it consumes, and it indicates when the thing is growing hungry once again.
This is can often be a good thing for the homeowner as well, for they have a near continual fire going during the cold nights of winter. This is not so wonderful in the summer, but attempts at removing firestarters are rarely succesful and often disastrous. One attempt, in which a man threw a bucket of water over the small creature in order to make the starter's lair less desirable, resulted in the burning down of the whole neighborhood and quite a bit of the surrounding woods. No one could get back into the area for two months, either, as so many firestarters had gathered to eat what was left.

Done in OC 1.1, hope you dig.