By the Way
Knowledge from Lore: Magic Rune Weapons are indestructible by their very nature. They are made with the souls of powerful individuals such as great heroes or even demigods. The weapons found here are not indestructible nor even mega-damage weapons, and the fake runes are not charged with any magic. A telepathic entity inside the item could fool the less knowledgeable into believing that it is an authentic rune weapon until someone tries to smack a demon with it.
Knowledge from Lore: Demons & Monsters A Syphon Entity is a bodiless parasite which is known for using trickery. This particular species of entity possesses and becomes anchored to nonliving items, typically something small and hand-held like a book or a necklace. It speaks telepathically with someone who touches the object and carries it. It has been known to lie to its victims or even convince them that they are crazy, all while draining them of their energies. Destroying the object merely releases the Syphon Entity, but there is a chance that the shock will shunt it away to its home dimension. The psychic powers of these creatures include unlimited telepathy with their victims, empathic control, stealing ISP or PPE, and others. Syphon entities are rarely summoned by Shifters because they are limited in their usefulness and clever enough to turn on their masters. Nobody in the Pecos Empire uses them. The Coalition knows of their existence and will use psychics who can exorcise to get rid of them. They are not as common as poltergeists nor as feared as tectonic entities, but they are gluttons for energy just like their distant cousins and have bottomless virtual-stomachs. One syphon entity would be bad enough, but a coordinated group could sow all sorts of discord and confusion on unprepared targets, like a squad of Dead Boys. A group which had advantages like Automatic Mind Block, Mind Block, and lucky dice rolls to save versus psionics would have fared much, much better.