With the Transformers Cybertron Primus with Unicron Head, the creator of the Transformers, Primus, changes from a giant robot to the homeworld of the robots in disguise, complete with cities and tons of little details from twenty years of Transformers history. Change the Primus action figure from mighty Cybertron protector to battle station. Omega Lock and Cyber Planet Key activate cool features, including power-up lights and sounds.