Terror In Equestria Alternate Timeline: When Brothers Wage War.

Rezimus watched the battlefield with utter contempt. Neither side had gained any ground since the battle begun. Swarms of flesh-eating parasprites came from the enemy swarmlords. A tornado struck within Armageddon's forces, Nifius was doing his job. The boy was his high priest, although he was very young compared to Armageddon's priest Dahrokar.

  Swordsponies were locked in combat. Boulders were flung at Rezimus's soldiers from enemy earthromancers. Enemy troops riding large reptilian beast charged only to be struck down by a barrage of arrows. Dahrokar was unleashing meteor upon meteor to break Rezimus's lines. However, most were blocked by shield spells cast by scholars. A black dragon emerged from the sky. This was his brother's familiar, Encio.

http://www.youtube.com/watch?v=v00IqSfSbvM

  The dragon was decimating Rezimus's infantry. He called out with his mind, and his call was received. Six phoenixes emerged from the beyond and collided in the wake of the sun. They formed the Sunbird, familiar of Rezimus. The dragon and phoenix battled midair in the midst of all of the pegasi locked in combat around them. Sunbird had a massive advantage, he could split into the six individual phoenixes as a method of dodging. The battle was still fierce in every way imaginable.

  The battle went on for hours and would've went on longer, but something had interrupted the clash. The two generals had both stopped telepathically issuing commands. Why? Both of them had taken notice of something, the sky had begun to turn purple.