When Jorvik was created,there were only 2 horses on the island.2 ancient spirits,who transformed into morgan horses.
The Spirit of Dark and Destruction transformed into a black morgan,
and the Spirit of Light and Life transformed into a cremello morgan.
After some thousand years,humans came to the island,but the 2 horses still had eternal powers.Some humans wanted to steal this magic,but they failed.
But one day,a witch called Pi captured the two horses.She had strong magic,so she made one horse from the two.She called it the Harmony horse.
This horse had a tovero paint horse's body,but it was the two eternal horses in one body too.
This Harmony horse once escaped from Pi,and ran into the Goldenleaf forest.Pi became very angry,and she wanted to kill the horse and get it's powers.She searched for him for weeks.But,the horse ran away.
A girl,called Skyra found this horse near Moorland,in a little forest.She,and her friend Arya promised that they will take care of it.
But I don't want to spoiler;)