Build King

A versatile powerhouse, Build King (Landfill) is the combined form of the Buildmasters (Build Team). Like his sometime-nemesis Baldigus (Ruination), he is controlled solely by the thoughts of his central component, with the other team members giving up their autonomy in the combined form. Also in common with the Decepticon combiner, he can switch his limb components into different configurations to optimize his combat abilities. His unique design lets any one of the subordinate team members form his arms, with other two serving as the legs, and gives him access to different tools and weeapons in each configuration.

(Source: The Transformers Wiki)