Black Emperor Immortal-Slaying Blade

The blade was a high-grade Acquired Immortal Artifact. It was a huge black blade with a layer of black light on its surface, from within which thin golden lines appeared, drawing balls of ancient runes that emanated terrifying fluctuations. The golden threads shone brighter as the heaven and earth spiritual energies flowed into it, and the condensed runes grew brighter still. Blinding golden and black beams of light radiated in all directions, mixed with powerful nomological fluctuations that caused the entire void to shake, extending a huge golden-black blade beam over a thousand feet long.