Quaerentes in Extremis
When Pralix marched on Damhan-Allaidh, she was joined by a Gaelic wizard named Damhadh-Duidas (roughly translated: ‘malice-writer’) who was of the same magical tradition. He could carve strange runes which cursed and stole life from his foes, healing him in return. Many believe he joined Pralix to betray her Ordo Miscellanea, but she did not trust him and forced him to prove his loyalty. Two battles were won decisively thanks to him, but he didn’t fight in the final offensive (perhaps because Pralix held him in reserve so he could not betray her) and, well, he didn’t ever betray Pralix. Despite his allegiances, he gained the respect of his allies and joined the Order as part of House Ex Miscellanea. There, he taught two apprentices, to whom he never revealed the true, Infernal nature of his power. He nursed a deep grudge against Pralix, however, and many believe he caused her death.
Those few of the Damhadh-Duidsan who practice the infernalism of their ancestor do so in secret, and most do not know he was an infernalist. They may know their bloodline was tainted, but not that infernalism still exists among them. Many have no desire to be diabolists, after all. The infernalists among them specialize in Consumption, Incantation, Malediction and shapeshifting. This makes them hard to detect, for many among the pure Damhadh-Duidsan possess giant’s blood or shapeshifting abilities, for the tradition descends racially from the giants of Scotland, Scandinavia and Iceland.