My Liver Is Proficient in Controlling Ghosts and Cultivating Immortals

Zhou Li, who was ruthless, profit-seeking and decisive in killing, traveled to a dangerous world where ghosts were resurrected and evil ghosts were rampant. In this world, there was a special extraordinary profession - ghost cultivators. Zhou Li, who was just an underground black boxer in his previous life, had no advantage at all. Fortunately, he had the golden finger of time travel - the proficiency panel. You only need to improve your training skills and proficiency to upgrade your skills. Others still need talent to practice, and there are bottlenecks. Zhou Li only needs Gan full proficiency to grow without limit.