I've Been Trapped for Ten Thousand Years and I'm Invincible

He was once the Eternal Emperor in ancient times. He once practiced magical skills to unify the world, but he did not want to be trapped in a mysterious place for ten thousand years. Ten thousand years later, things have changed and people have changed. By constantly tempering himself in the loneliness and darkness, he came back to Wuquanmen in the world of immortality and became invincible. This ten thousand years of imprisonment did not trap him, but instead transformed him. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.