Trouble. It follows me around like an unwanted pet. The kind of pet liable to maul my friends' faces. So I tried to face the demon alone. But no one can face life alone and my friends... They're less fragile than I gave them credit for.
Far from Canterlot and forced to work in gem mines for cruel Diamond Dogs, a young unicorn named Bone Marrow's pursuit of his cutiemark reveals a unique talent: raising the dead.
Necromancers. The foulest of ponies. Those who would sacrifice their own kind to further their unholy powers. To meet one is certain doom. So why am I still here? Forget the bonds of legend and listen to the truth of my tale.
Death. Death comes for us all. Yet what happens to those that flee deaths clutches and manage to escape? When death himself can't catch them, he finds those that are overlooked by all to do so for him.
Almost a year after Celestia's great crusade against necromancers concluded, Mortem discovers a rather large army outside his castle. Not wanting to cause an incident, he works towards a diplomatic solution.