STRIKER: Independent Beast Tamer - Chapter 527: Core Area again!

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

A calamity descended, consuming the world in chaos.With their final strength, humanity raised towering walls and built great cities to safeguard the last remnants of life.But now, the calamity stirs once more.This time, humanity will not just defend—they will rise and strike back!Witness the heroes.Follow their example.Become the hero!