Mortals Are Invincible, the System Is Here!

After eight hundred years of cultivating immortality, Mo Xiu had just destroyed the Yin Luo Sect and killed the old monster Feng. Mo Xiu had no enemies in the world anymore, and a sentence suddenly popped into his mind. [Congratulations to the host for becoming an immortal cultivator, please kill Mo Juren within one year. Completion reward: Kuishui True Spirit Pill! Failure penalty: the current level is reduced by one level! Mo Xiu: "I'm here from the system. Why is it so late? I'm already invincible! But I'm still interested in the elixir." …