“Though I walk amongst beasts and feel their claws, may the Emperor hear my prayer and let me pass unharmed.”
–from the Canticle of Passage of Saint Drusus
The only knowledge that mankind has of Orn is from the Disciples of Thule, who were drawn to the tangle-forests of Orn by the emanations from a dormant warp drive within a half-buried xeno ship. There the Explorators discovered a warlike, near-feral xenos breed using the strange vessel as a form of township or nest. The xenos wielded tech-devices as though relics, and hunted, tore apart, and consumed surveyor servitors dropped from orbit. The Thuleans marked the world with the rune of intransigence, declared it anathema to mankind, and moved onward in their quest.