The Grandmaster of Heaven's Self-Cultivation

He woke up one day to find he had become the Lord of Heaven-Splitting! Thinking he was a fake Lord of Heaven-Splitting, he nervously and cautiously cultivated across the primordial world. Who would have thought he was the real deal? This was one enormous conspiracy! Oh, no! It was an open plot! Patriarch Hongjun: My disciple, let me explain! Lord of Heaven-Splitting: Heh. Not listening. Goodbye, blocked. No explanations! A story about Tongtian being reborn with no memories and thinking he was a fake Lord of Heaven-Splitting.