For millenia, the Angelus and the Darkness have waged an incessant war against one another, our world their battlefield. From host to the host, these two entities jump, never ceasing, always seeking the others death. But, with the new host for the Darkness comes complications, and as the young man who bears it is encircled by enemies, an old friend of the diarchy sends the human to Equestria.

Thanks to Web of Hope for the pre reading^^