Welcome to the end of the world,,,,,,

When Celestia invaded Earth, she hid her hate for the Humans, claiming to be trying to save the race from destroying themselves. she tried to transform humanity slowly with her Conversion Bureaus but failed, then came open warfare and her barrier that would transform humans into ponies and destroy human civilization........

It backfired.......

Now, the monsters of Earths Prehistoric past have returned, attacking all ponies, Equestrian and New-Foal alike. Equestria is gone, replaced by The Blackclaw Empire. Now only a few rebel pony tribes remain as they try to survive a world in Chaos, a planet known as Earth.

Welcome to Conversion: BACKFIRED!