Think about it. Those horns on Skolas's back are that of the Ahemakara. Skolas is obviously prideful, "The Kell of Kells" as he refers to himself. As we can deduce from the Ghost Fragment Warlock 1 "what drove me to such pride?" The bones (or any kind of fragment) of the Ahemakara force a prideful like emotion on the holder. So could this be where Skolas's pride comes from? Could this be what drove him to betray our greatful Qween?