Long before Nightmare Moon, before even Discord's reign of chaos another evil had it's grip on Equestria.
Whose name was lost to time and became known as only The Dark one, or the First Evil. Dra'gos endlessly returns to fight, even after his second downfall at the hooves of the Princesses he was thought to be eliminated once and for all, but his shadow looms once more as his Master summons him once again to conquer the lands of Equestria and eventually the rest of the world.

Warning Contains extreme content that is not appealing to most, by the chapter:
Nothing to speak of in the first two chapters.
Arrogance: Mild Burning, Begging, Crude Insults, Desperate Attempts at Self-Preservation, Death and Light Necrophilia.
Lust: Mind Games, Inexperience, Corruption/Transformation and Light Cannibalism.
Envy: Extreme Anger, Broken Bones, Decapitation, More Desperate Attempts at Self-Preservation, Asphyxiation, Death and Mild Necrophilia.
Pride: Dark Whispers, Corruption, Size/Age Regression, Fusion, Gagged Mumbling, Suffocation, Death and Light Necrophilia.
Delving Deeper: Rough Sex, Self-Hanging, Death and Necrophilia.
Eclipse: Submission, Live-Roasted Princess, Death and Mild Necrophilia.
Darkness Rises: Grave Betrayal, Public Use, Skinning, Death and Light Necrophilia.
Ready to Rumble: Homeless, Arena Fights, Necrophilia, A Chimera, A Dark Ritual, Misleading Promises and Death.
Temptation: Character building, Sappy accidental Romance, Corruption, Dark Whispers, Mind control, Betrayal, Petrification, rape and Death?
Changing Tides: Ancient Prophecies, Twins, Clash of Ideas, Dismemberment, Paralysis, Rape and Forced Recruitment.
Desperation: A spark of hope, Madness, Fighting, Foalcon, Necrophilia, Necromancy, Rape and Death.