The Transformers: Headmasters #3

Direct

The Decepticon Terrorbots arrive to attack a Nebulan city, but the Technobots arrive to defend it. The Terrorbots combine into the giant Abominus, but the Technobots also combine into the giant Computron and win the battle. The Decepticons then copy the Headmaster technology, and create six Headmasters by combining with Lord Zarak and five of his co-conspirators. The Autobot and Decepticon Headmasters engage in fierce battle, but the Decepticons end up victorious after the Autobots are distracted trying to save some of the captured Nebulans.