Combiner (or gestalt) technology enables specialized teams of 2-6 Transformers to combine into one massive super-warrior. A single combiner is an almost invincible weapon, and they are justly feared. Fortunately, it is extraordinarily difficult and costly to create a combiner team, as not only the physical frames but also the personas of the team members must mesh into a coherent whole. The technology itself was created by the Constructicons and stolen by Autobot spies.