I can't think of what D&D book this artwork is in. Since I don't know that, I obviously can't show it to you.
It is of a red skeleton (with fiery hair?) that has to do with fire, I think. IIRC, the artist was Sardina or something like that. (Sarhdina?) but I can't recall the name exactly, so google won't help. It is not the Vilewight from BoVD (though BoVD was the first place I checked). The picture is mostly red, and is done in a "less refined" style. It also is not the Lavawight from the ELH.
Anybody got a clue?