It"s the ultimate showdown in the Quest for Energon! The 379 pieces in this awesome Battle for Energon set let you build an Optimus Prime figure as a powerful robot or as a semi truck, and a menacing Megatron figure as a robot or tank! This 4-in-1 set also includes four Kreon figures: Optimus Prime, Megatron, Security Officer and Tank Driver. Arm them with their weapons and build the Bank building for them to fight over! Who will prevail when Autobot takes on Decepticon? Build your Transformers adventures, then tear them down to build new ones!