Fusion coil - Halopedia, the Halo wiki
www.halopedia.org › Fusion_CoilThe Halo 2 -era fusion coils are explosive objects matte brown and rectangular, overlaid with what appears to be austere gold circuitry on the surface. In Halo 3, the fusion coil has been graphically redesigned. The actual plasma coil appears to be an amber, darkly-glowing, cylindrical object within a metallic-gray colored frame.