(Ruthless and decisive; sharp-minded; demons and monsters run rampant; fiery action)
Also known as Long Life Begins with Killing Snake Demons, Life-Fueled Martial Arts: Betting All My Lifespan, and Life-Fueled Martial Arts: I Rule the Demon-Ravaged World.
Synopsis:
Li Qingshan was an ordinary mortal with a lifespan of no more than sixty years. Fortunately, he could spend his lifespan to endlessly refine martial arts techniques. After killing a snake demon, he unexpectedly discovered that he could obtain its remaining lifespan.
So, in this world plagued by evil spirits and overrun with demons and monsters, Li Qingshan turned his blade on them...
From Hundred Slashes Saber Art to Thousandfold Consecutive Slash;
from Dragon Claw Hand to Divine Dragon-Transforming Claw;
from Iron Body Technique to Golden Body Treasure Form.
“Li Qingshan, what exactly have you done? Without the Demon God, how are we supposed to fight the Earthly Abyss?” A human shrine keeper stomped and glared at Li Qingshan.
Li Qingshan gave a faint smile. “Simple. I become one with the Dao.”
As he finished speaking, he finally stopped concealing his aura and revealed his cultivation at the Dao-Union realm.
In an instant, the entire scene fell silent. Everyone present dropped to their knees and cried out, “We pay our respects to the Dao-Union Divine Venerable.”
Time passed, seas became mulberry fields, and only when he looked back did he realize that the world had been transformed!
It would be perfect if you can add some external power.