Global Reincarnation: Why Can't I Become Stronger If I Am Immortal?

Li Yi woke up again, looked at his hands in a daze, and then subconsciously touched his neck. "Oh, it's still there." The tired voice reeked of desperation. How many times have I lost count? "Immortality is just a curse. I am really pathetic, hahahahaha!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.