Power up for the ultimate robot battles! Your STEAMHAMMER figure is already a virtually unstoppable opponent in his Steamhammer Commander vehicle mode and Commander robot modes. But his strength gets increased five-fold when you convert him to Power-Up mode and convert his CONSTRUCTICONS drone figures into his limbs! And the action doesn’t stop there. With this Power Core interchangeable robot combination system, MINI-CONS (sold separately) and drone vehicles can attach to power up any Commander figure. Collect more packs and you can create tons of unique and fierce robot battler figure combinations! Five-pack includes STEAMHAMMER, Drill Drone, Front End Loader Drone, Plow Drone and Steamroller Drone figures.