This increased his confidence in surviving the Heavenly Tribulation. He needed to improve the 'Yuqing Thunder Scripture' as much as possible before attempting the tribulation.
Unknowingly, the twenty-day appointment had arrived, but he would not forget, as his natal magic treasure, IBMz15, reminded him.
He took out a jade bottle, which contained two Fourth Grade Early Stage Spirit Pills, probably the worst quality spirit pills he had ever made.
He truly didn't dare to refine the Fourth Grade Spirit Pills any further. According to the information he had obtained, there weren't many alchemy masters on the Dongqi Continent who could guarantee full Dan, and they were all from top sects.
When he exited his cave dwelling, he saw Yu An's anxious face.
Over the past twenty days, Yu An's mind was never settled. After all, it was a Fourth Grade Demon Core. Although Yu Ancestor hadn't said much, he knew how difficult it was to obtain a Fourth Grade Demon Core.