From the ruins of a Kabal a Coven arises

The assault on the Tarterus System has been difficult for the Cinder Shrike Kabal. With early raids against a force of Iron Hands and their Knight allies left the raiding force in tatters. The seizing of a relic from under Wolf Lord Ragnar Blackmane and the capture of most of his warriors filled the holds of our vessels. His mind addled by abuse of stims and other drugs. Our Archon Kiranex led an assault against Imperial lines.

While at first our raid had all the makings of a massacre of Imperial forces. the force was undone from within. Seeing Kiranex stranded with barely half his incubi bodyguard alive Dracon Liyaneth struck. Signaling the Kabal to abandon the Archon She sealed our fate.

Kiranex was cut down by an Imperial Assassin. His Incubi gunned down before the assassin struck. Liyaneth exuberant in her victory failed to notice the incoming Valkyries. Between them and a miraculous battle cannon round her trueborn and her were obliterated. What was left of us fell back to the staging grounds for the slave raid. We should have known what was next. No one wondered why in all that carnage had the Scourges come away almost unscathed.

The Coven allied to our Kabal for millennia waited for our wounded and dead to return. The gleam in their eyes told of treachery. I am one of the last Warriors of the Cinder Shrikes. This burnt out raider our last refuge. The air around us is filled with gibbering laughter, screams, and the dark commands of the Coven lords.

Floating above his pieces of art. Tarak, Ancient of the Excoriate, looked on. Though Covens rarely entered Commorite politics Kiranex had crossed the line. He had taken a blast pistol to Tarak's masterpiece. A grotesque stitched together from no less than an entire Hives population. Every square millimeter chosen for it's perfection. Below him the masked Wracks those who would one day join the Coven stood side by side with the Artwork of their masters. Mon-keigh,Kroot,Tau,and Eldar they were the blank canvases for the coven. Their unmasked faces marking them as the test subjects. The Coven use to perfect their trade.

He turned dropping his hand that had been raised. With that motion a horde of nightmares charged the last pocket of resistance. Those deemed worthy would replace the losses. Ofcourse with this harvest the covens ground forces had swollen to triple their number. Now it was time to work on a new masterpiece one in which the recovered body of Kiranex would be donating some raw materials..

It's a very classic Dark Eldar style story. Using a dangerous situation that looks like it's going to go one way to betray the overconfident you plan to betray. Very nice.