The Echo Duplicate is a high-tech, holographic projection device that mimics the appearance and abilities of a selected hero for a limited time. It features a sleek, futuristic design with a central core that emits a soft, pulsating glow, surrounded by floating geometric panels that dynamically adjust to the duplicated hero's form. The surface is smooth with a polished, metallic finish, accented by vibrant energy lines that pulse with the device's activation. The core is the focal point, with intricate circuitry patterns visible beneath a translucent casing, giving it a high-tech and slightly alien aesthetic.