The Emperor's Horn
Halo Artefacts, or Halo Devices, have been known to select arch-heretics, recidivists, and the Holy Ordos of the Inquisition for millennia, ever since renowned Explorators and Rogue Traders of antiquity returned from the Halo Stars bearing these devices, along with tales of corpse stars and disturbing pict-records of dead xenos worlds.
The Artefacts defy analysis by tech-augury and are nearly imperious to age and harm. The corrupt amongst the Imperial masses long ago discovered that, through dak transformation
of body and mind, some of these xenos devices can grant life eternal. The body is restored to youth and the passage of years no longer weakens the flesh. Other Halo Artefacts were found to possess stranger and greater powers, their unholy potency behind the rise of a number of infamous arch-heretics. As centuries passed, the Artefacts were sought by masters of the occult and became legends amongst the power-hungry, associated with dire heresy and corruption. Nonetheless, perhaps a few score Artefacts have changed hands for vast sums since the Calixis Sector came into being, and the opening of the Koronus Expanse in the 41st millennium has added to their number.
Halo Artefacts have many forms, but most are small and easily confused with odd jewellery, small pieces of armour, or even curious, abstract miniature statuary. Some are irregular spheres, some segmented ovoids a handbreadth wide, still others small scarab-like objects. All are clearly xenos in origin, made of an unidentifiable metallic material, and their texture and surface patterning calls to mind the shells of insects or skins of lizards.