Fantasy: After Becoming Invincible, the System Forced Me to Complete Tasks

I am already invincible, why did you come to the system! Let me go to the modern city to complete your mission of cultivating the ancient worldview? What's going on? Where were you when I was struggling at the bottom? Where were you when I was going through twists and turns? Where were you when I was most desperate in life? Now that I am invincible, you come here to torture me! Jiang Fan travels through the world of immortality, and after 10,000 years of cultivation, he finally becomes the strongest in the world! Naihe suddenly awakened to an incomparably useless system. Whenever he used magic power, he would jump out and die with him! As a last resort, I can only go back to the original path and complete the novice tutorial on system layout. But as he went deeper into completing system tasks, he discovered System! You are my god! It really wouldn't work without you!