Grandmaster Her? Are You My Apprentice?

Hundreds of lives will turn around, and the tribulations will never end. A slight thought thousands of years ago, a small mistake that no one noticed, quietly created long-lasting consequences. Reincarnations come and go, and past karma is piled up layer by layer, hidden in every life, entangled silently, and never dissipates. When the opportunity comes together in the mortal world, the old causes that have lasted for hundreds of generations suddenly burst out. The thousand-year karma derived from his minor mistakes in the past has arrived as expected. He has no way to escape and can only face this ending that spans eternity and has accumulated for hundreds of generations.