Zhi Xiang Liandan do Wo Feisheng Cheng Shen

The world of cultivators suddenly transforms into a savage wilderness overrun by monstrous beasts. All cultivators are plunged into a bloody struggle for survival. Amidst this chaos, a alchemist named Jing Mo unexpectedly discovers the long-lost “Dan Cultivation” system among his master's relics. Using elixirs to fight? Witness the mightiest alchemist—Jing Mo—as he cultivates, refines elixirs, and ascends to godhood!

(Source: Kuaikan, translated)

Note: Includes one extra chapter.