The Destroyer

The Destroyer is a hardmode version of Eater of Worlds boss, which will be introduced in the 1.1 patch. The Destroyer has a metallic-like body unlike Eater of Worlds which has a corrupted worm body. The Destroyer has red lights in it's body. Those lights are pods that The Destroyer sends out. If the light isn't lit up, that means the pod was already summoned.