Zhang Lie took almost half a month to finish the concoction. He treated the ingredients with care and devoted attention, and after one soul-crushing failure, successfully brewed a vial of Potion #4.

Glancing at the rainbow-colored potion in his hand, Zhang Lie felt a burden fall from his chest. It had taken longer than he had expected, but he had finally done it.

He downed the potion in one gulp.

Unlike the previous three potions, Potion #4 didn't taste like anything. It trickled down his body as though he were swallowing a cloud. However, his body responded immediately. A scorching heat enveloped him from head to toe, as though he had immersed his...