Transformers Headmasters

Galvatron leads a group of Destrons in an attack on Seibertron, the home of the Destron Headmasters. The Cybertrons are saved by the Cybertron Headmasters, commanded by Fortress, also known as Cerebros, who is part of Fortress Maximus. Fortress had left Seibertron millions of years earlier in search of energy and has now returned. He reveals that the Headmasters originate from a planet called Master, where human-sized robots constructed larger Transformer-sized bodies for themselves. These smaller robots can transform into the heads of the larger machines and have now entered the conflict between the Cybertrons and the Destrons.