Heavy metal hoofbeats ring across Equestria. Inside his stone prison, a tiny fraction of Discord’s power remains. He searches for something that can cause enough chaos for him to rebuild his strength, and stumbles upon another brightly-colored world: the world of Robot Unicorn Attack! Now the Elements of Harmony must find a way to stop an immortal robot unicorn that feeds on magic and destruction.

[Crossover with adult swim game: Robot-Unicorn-Attack.]

It will have some adult themes and violence, mature readers advised.