The Yinglong is a high-tech, futuristic energy sword with a sleek, elongated blade that emits a vibrant neon-blue glow. The handle is crafted from polished black metal with intricate circuit-like engravings that pulse with a faint light, suggesting advanced energy containment technology. The blade itself is semi-transparent, with a core of concentrated plasma that flickers like electricity, giving it a dynamic and dangerous appearance.