Harness Energon Igniters tech and unleash the power within! The lifeblood of Transformers robots, Energon, fuels the epic action on Earth and beyond. Now, imagine harnessing this vital energy source with Energon Igniters toys. Change this 7-inch Nitro Series Optimus Prime converting action figure from robot to truck mode in just 10 easy steps. Then plug the included Energon Igniters core into the vehicle and push down to unleash exciting driving action! Imagine the massive engine of Optimus Prime roaring onto the highway. As Decepticons approach, he commands the road with unstoppable Autobot force. The Energon Igniters core unleashes the power in all Energon Igniters figures (each sold separately; core only available in Power Plus and Nitro Series).