When the Covenant had come to Equestria seeking vengeance on the heroes of Humanity, they had a little surprise waiting for them in the form of seven ponies, a dragon, and the power of friendship and love. Now, Chaos rises again and it isn't Discord. The board is set, the pieces are moving. Now the UNSC and the Ponies of Equestria must face a new and dark power from beyond their universe, a danger that threatened galactic civilization with extinction once before in another dimension altogether. A force that harvested advanced Civilizations every 50,000 years. A force that forced the UNSC to withdraw all forces from Equinia just before Tirek's arrival. After the defeat of Tirek and Twilight's rise to greatness, Once again our heroes must face impossible odds when this darkness arrives on the world of Equinia and once again threatens civilizations.

Maybe the firing of the Crucible didn't destroy EVERY threat…..

Crossover: Halo/MLP/Mass Effect
Event Timelines:
Halo: Between events of Halo 4 and Halo 5
Mass Effect: After defeat of Reapers (Renegade Ending)
MLP: After Tirek's Defeat.

MLP, Halo, and Mass Effect belong to Hasbro, 343 Industries, and Bioware respectively. I do not own any of the locations, inventions, or characters of any universe except for the personalities of my original characters.

Let the games begin (evil laughter)