Serpents are large, sinuous creatures, 10 to 15 feet long, with lithe, muscular bodies covered in matte black scales that absorb light, making them nearly invisible in darkness. Along their spine, bioluminescent spots pulse in shades of green and purple. Their angular heads have sharp jawlines and long, needle-like fangs that drip glowing venom. Their large, round eyes glow a sinister green, with vertical slit pupils. Thin, shadowy tendrils extend from their bodies.