Unicorns. Pegasi. Abominations of science, created through a combination of drugs and machines by a fanatical culture of ponies. Long ago, the Council of Equestrian Species conquered and banished the deviants to the stars and placed their planet under C.E.S. control. Centuries of propaganda and strict scientific regulation relegated them to little more than myths and old ponies' tales. You know, the stuff mothers use to keep their foals well behaved.

Ten years ago, those "myths" and "old ponies' tales" returned with more power and vengeance than ponykind could have imagined.