Twilight has earned the trust and loyalty of both Hesperos, a former Rubricae of the Thousand Sons, and Te'kan of the Slamanders. Together they face the final fate planned for them deep within the maelstrom of the warp. A Warhammer 40,000 crossover.
Twilight has restored her newest companion to the world, a Rubricae of the Thousand Sons. Now, what does the presence of this former Astartes mean for Equestria?