The Worldline Zero is a futuristic, high-tech sword with a sleek, elongated blade that emits a faint blue glow, indicative of its exotic energy source. The blade is smooth and slightly curved, with intricate circuitry-like patterns etched into its surface, suggesting advanced technology. The hilt is ergonomically designed with a matte black finish, featuring subtle glowing accents that pulse with energy, and is constructed from a lightweight, durable alloy.