"They flee from the horrors I bring about; they fear the mutations I wreak on their flesh. Do they see beauty in the chaos I create? No. For Tzeentch has not opened their all-seeing eye."
- —Mordant Hex, Sorcerer Lord of the Six-Cursed
Mordant Hex, Sorcerer Lord of the Six-Cursed, was sent by Ahriman to the barren, airless planet of Etiamnun III on the distant Eastern Fringe. The arrival of Thousand Sons drop-ships shattered the peace that had shrouded the world for millennia, though the small community of hermits gathered within the central monastery met the arrival with quiet, contemplative acceptance.
Hex's forces advanced steadily through the mountain passes, directly towards the gates of the hermitage where he strikes the giant adamantium doors nine times. As the doors yawned open, many of those inside were wrenched into the cold vacuum of the planet's surface, while those who remained in sealed chambers were swiftly hunted down and massacred. Even facing death at the hands of the Six-Cursed, the inhabitants gave little or no resistance.
When all were dead, Hex descended into the heart of the mountain complex, to a long-forgotten xenos chamber buried under layers of ancient Imperial construction. Within the chamber was the prize for which Hex was sent -- an entrance to the Webway and the first step in Ahriman's plan to claim the secrets of the Aeldari.
- Codex Heretic Astartes - Thousand Sons (8th Edition), pp. 7, 28, "The Sacking of the Etiamnun Reclusiam"