A Legacy of Kain crossover

Ever wonder why Canterlot was built into the side of a mountain? Well, after Nightmare Moon's birth, Celestia had it built to be closer to Equestria's greatest secret. Now, a millennium later, new guardians are born and Celestia must train them while Luna recovered.

The Mane Six discover that the Elements of Harmony were not their only mantles they had to bear. Upon Celestia's words, they learn of Equestria's secret: The Pillars of Equestria.

Now, the Mane Six are under the tutelage of a vampire-turned-pony named Medusa to understand their powers and their roles as Pillar Guardians. Yet as the teachings begin, a dark omen arises from the other side of the world. In Equestria's sister-land: Nosgoth.