"Harmony doomed us. I killed Cozy Glow (although she was always a robot). If anycreature remains, heed this warning." - Former Princess Twilight Sparkle.

Discover the genesis of Pony Generation 5 technology and the fall of civilization!

Crossover: Terminator. (Yes). (Cozy does not lead an army of killbots.)

An entry in the Sci-Fi contest (Won the Committee prize for "The Cozy Glow Committee Award for Best AI Apocalypse:". Proceeds donated by the contest-runner.)

Image: Modified version of this source and this source, with addition of text and binary golly, oh no.