I Just Became an Immortal, You Tell Me This Is the World of Martial Arts?

Traveling to the ancient world, the system told Zhang Daoan that this was a very scary world of fantasy and high martial arts. Immortals are not as good as *, Immortal Kings are everywhere. Many great powers exploded the world and penetrated the heavens at the slightest disagreement. Zhang Daoan was so frightened that he trembled, so he could only rely on the system, study hard in the novice area, and practice the cultivation techniques. When Zhang Daoan finally became an immortal and walked out of Novice Village with a trembling heart... But suddenly he discovered that he was invincible right out of the mountain! I just became an immortal, and you tell me this is a martial arts world? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.