Luban's Secret Technique: Seal the Door and Rule the Tribulation

Have you ever heard of Luban Ruler or Luban Shu? The day my grandpa died, I was spitting out coffin nails, and there were even coffin nails and bloody hair hidden in the wall. Master Lu Ban in the village said it was a dead end of Feng Shui, but Master Lu Ban, the man who buried the evil things, hesitated to speak. Little did he know that there was a shocking conspiracy hidden behind it...