Living as a Mortal: Grinding Experience Starting from the Underworld

Zhang Feng unexpectedly transmigrated to the Chaotic Star Sea in the human realm, encountering ghostly mist and entering the Netherworld. He also awakened an experience panel; once he grasped the basics, any cultivation technique could be improved by grinding experience. From then on, Zhang Feng had a cultivation path: "Survive, grind experience!" The Netherworld was filled with a life-sustaining aura, where cultivators lost all their cultivation; no matter how high your cultivation level was outside, you were no different from a mortal here. It was a safe place for survival. Survive, grind! Grind your cultivation techniques to perfection, your skills to perfection, and your spiritual roots and talents to the highest level! In the treacherous Chaotic Star Sea, he slayed demons and obtained cores in the outer sea; improved his cultivation in the inner sea; seized treasures in the Void Heaven Palace; proved his Dao to the Nascent Soul stage in the Star Palace War; pacified the Chaotic Star Sea amidst the chaos; and finally, went to Tiannan, to the Great Jin Dynasty, to fight and debate with various righteous and demonic cultivators until he ascended. [Leveling-up story, steady progression, focusing on the protagonist's own growth in the early stages, with slower interactions with other characters in the story]