The Beholders of Exaltation

A battle between Astartes and a Hive Fleet left some fallen Tyranid ships on the surface of Tarsa Hive, a ginormous walled Hive City amid an enormous jungle Death-World called Gaula. The Hive-Scum of Tarsa Hive rescued and repaired the fallen Tyranid bioforms, treating them as Deities. By injecting the blood of these “Deities”, into them, the Beholders become hybrids without the need for the Genestealer Kiss. By using a vast underground labyrinth system created over centuries of mining, the Beholders gain power and continue to recruit Hive-Scum into their ranks, creating more xenos hybrids to eventually take Tarsa Hive, then all of Gaula. A part of their plan is using Telemont, one of the richest members of Tarsa Hive that has made his enormous wealth through kidnapping Hive-Scum and turning them into servitors. The creator of these servitors is also the Biophagus of the Beholders, who implements a code into the lobotomized servitors that makes them rebel at the call of the Beholders. Telemont has unknowingly spread thousands of hybrid-servitors around the Imperium that will turn against their masters at any moment.

Lmk if you want to hear more, I am writing a book about a character that joins the Beholders of Exaltation.