As the war between Autobots and Decepticons waged on, it became apparent to Optimus Prime that he and his team had to leave Cyberton in order to survive. However they soon found themselves awakened on a new world after centuries of sleeping. But this was no world with humans having advanced technology. This was a world that was powered by steam and magic.

Takes place after the MLP movie

Art: https://www.deviantart.com/guidoguidi/art/IDW-Transformers-Hearts-of-steel-Optimus-Prime-974853889