I Secluded Myself for Ten Years, Now I’m Invincible in the World

Ten years ago, Qin Yan, also known as Qin Beixuan, was accidentally brought to Mount Kunlun to cultivate immortality by a powerful cultivator undergoing tribulation. Ten years later, after reaching the Foundation Establishment stage, Qin Yan comes down from the mountain, invincible under heaven. Early on, he single-handedly crushes China's ancient martial arts families and sects until they bow their heads in submission.

Later, he even travels to foreign countries, facing modern firearms with his immortal cultivation and blasting through multiple nations, including Mao, Wa, and Mi. He reaches the pinnacle of the world, with a hundred nations paying homage, and earns the title: Beixuan Celestial Venerable.

At sea, while other powerful figures ride speedboats, he rides a shark.

In the sky, while other powerful figures fly on swords or pillars, he flies on people.

…

As the most shamelessly boastful cultivator around, Qin Yan takes showing off to the extreme. He's either showing off or on his way to show off.

P.S. The protagonist is decisive and ruthless, invincible from the moment he appears, and steamrolls his way through the story. Readers can enjoy it without worry.