The Transformers: Headmasters #2

Direct

Lord Zarak tries to manipulate the population of Nebulos to turn against the Autobots, and he manages to find a way to contact their enemies on Cybertron. Providing the Decepticons with the space coordinates for Nebulos, Zarak invites them to his planet to help fight off the Autobots. The Decepticons arrive, and lay siege to the main Nebulan city, whose defenses are no match for the Transformers. Five Nebulans undergo a special process where they are bonded to special armor that can transform each of them into an Autobot head, which is then attached to one of the five headless Autobots.