Enraged, Chewbacca, Rey, and Finn start firing at Ren and the stormtroopers. Ren takes off his helmet and shows her his face. However, they would need to do it before the First Order charges the Starkiller weapon and destroys D’Qar. Finn gives them the Starkiller’s blueprints, which reveal that the Starkiller drains the energy of a star in order to charge its primary weapon, and that it requires a thermal oscillator, which sustains the energy on the planet, in order to function.