Twilight has earned the trust and loyalty of both Hesperos, a former Rubricae of the Thousand Sons, and Te'kan of the Salamanders. In the idyllic realm of Equestria, the need for such mighty warriors is nonexistant. However, outside Equestria's borders are lands wild and dangerous. Worse, the galaxy the astartes call home has not forgotten them. Together they face the final fate planned for them deep within the maelstrom of the warp.

A Warhammer 40,000 crossover.