The Most Powerful Actor in the World of Immortality

Traveling through the world of immortality, I awakened to a strange system: within the same realm, I am invincible; in a cross-level battle, I will die. As a result, I became the most pretentious genius in the world. Competition among peers? I suppressed it with a snap of my fingers, the wind was light and the clouds were calm. Senior testing? I smiled profoundly, turned around and ran away. Everyone thought I was a rare genius, but I was the only one who knew it—I panicked a lot. Until that day, the true immortal lower world was forced to fight in the same realm as me... The whole world is waiting for me to kill the real immortal and make my name immortal. And I looked at the words [Same Situation Judgment: Established] on the system panel and slowly rolled up my sleeves. "Um... Have you ever heard of scientific cultivation of immortality?"