The Worldline Zero is a sleek, futuristic sword with a glowing blue energy blade that emits a faint hum. The hilt is crafted from dark metallic alloy with intricate geometric patterns, featuring a small circular core that pulses with light. The blade itself is semi-transparent with a crystalline structure, giving it a sharp, angular appearance that tapers to a fine point. The overall design is symmetrical and highly detailed, with a balance between organic curves and precise engineering.