Xuanhuan: It Turns Out I'm the World's Only True Immortal

[Xianxia + Monsters + Combat + Invincible] After transmigrating, Lu Bei found himself trapped in a secret realm for countless years. At long last, seekers of immortality came to his door. The barrier was broken, and he eventually agreed to travel three thousand miles of magnificent scenery with them. As they ventured deeper, this strange world slowly unfolded before his eyes like a painting. There were monsters, ghosts, and gods, but he had yet to see the immortals of legend. Along the way, he visited famous mountains and rivers and witnessed every facet of life. Lu Bei had thought he was nothing more than an ordinary mortal. Only at the very end did he realize that he was, in fact, the only true immortal in the world...