[Invincible]
Lin Xuan once spent 3,000 years practicing martial arts in a secret realm to resist the demons from beyond the borders.
To break through to the next realm, he even internalized the System, making it part of himself. He practiced martial arts to the point of madness and nearly forgot that he was a transmigrator.
In those 3,000 years, he tempered his body to level 9,999, yet never broke through to the Martial Artist realm.
At last, he decided to leave seclusion and see whether the world was still standing...