Once upon a time, the Changelings were made up of hundreds of small hives each competing for love. One day a ruler of a hive tried to make peace between the various waring hives and the nations that they raided. He was eventually able to keep all of the hives in line long enough to lay down proper rules for how his race would interact with others, alas his efforts to make true peace were cut short when the Minotaurs and Griffins allied to destroy him and his race. With the survival of the Changeling race at stake, he gave his life to allow his hive to escape, and now over five thousand years later Changelings continue to abide by the rules he put down in life although few Changelings can remember who put them in place.
To most, this would have been the end of the story. The noble king died to give his subjects a chance at survival, he has then begun to be lost to the mists of time, and now he has been forgotten with his lessons being remembered for generations to come. But Changelings are strange creatures capable of many impressive feats that other races can't hope to achieve, and while many assumed that he had died, The Scarred King of the Changelings is not one to give up on his dreams so easily.
So he sits on his ancient throne in his ruined hive, which had become buried over the centuries, slumbering and waiting. For what or who anypony could guess but soon he will be forced back into Equestria and once he does he will annoy the current Queen of the Changelings to her wit's end. So listen well to the tale of the return of sanity in the war-torn and corruption-filled land of Equestria.