Bring a System to Cultivate Immortality

Ye Ling, a frail and sickly young man from Earth, accidentally acquired the Three Realms System and traveled to the world of immortal cultivators - the Wilderness Continent. There are many sects, monsters and beasts everywhere, and geniuses and evildoers emerge in endlessly! There are piles of bones, rivers of blood, and the evil energy of the Forbidden Demon Abyss is overwhelming! Can Ye Ling, who was originally a weak scholar, use the Three Realms System to fight his way through this wilderness? Can he compete with many genius monsters on the road to becoming an immortal, and finally become an immortal against the odds?