Spiritual Qi Revival: I Keep Killing Until I Become Invincible

After transmigrating to a world undergoing spiritual qi revival, Ye Feng is attacked by demons from the start. Fortunately, he obtains an outrageously powerful Heroic Spirit System:

"Combat energy detected. Heroic Spirit Core activated!"

And then:

Mutant beasts: "What the hell? Why does this guy get stronger the more he fights?!"

The great clans: "Good heavens, why can he wipe out our entire family all by himself?"

The young geniuses: "Damn, this kid was still Bronze yesterday. How is he a King today?!"

Mutant monsters: "This makes no sense! Who's the real demon of the abyss here? Waaaaah!"

Ye Feng says: "Oh, come on! I haven't had my fill of killing yet. How did I become invincible so quickly?!"

P.S. An invincible power fantasy. See how the protagonist cuts through everything!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.