Coldheart is an exotic trace rifle with a sleek, futuristic design, featuring a long, narrow barrel that emits a continuous beam of cold fusion energy. The weapon's body is primarily composed of a dark, metallic alloy with glowing blue energy channels running along its length, highlighting its advanced technology. Its handle is ergonomically designed for precision aiming, and the weapon's core visibly pulses with energy when fired, creating a striking visual effect.