More Etherium capabilities

…becomes a ghostly retinal after-image, flickering toward the foe as though projected upon a faulty pict-reel. When required, Kord can simply vanish altogether, prowling through the midst of his enemies and reappearing only when doing so will reap the greatest harvest of terror.

"Assassinorum Execution Force"



Perhaps most unsettling of all, the Eherium also renders the Culexus Assassin nearly impossible to detect, whether by conventional senses or via complex mechanical sensors.
A Culexus can stand in the very same room as his target yet remain hidden, his victims feeling only a mounting sense of unease, and glimpsing nothing but phantoms haunting their peripheral vision.

"Dataslate: Officio Assassinorum"