After Being Chosen by a Rich Man, I Spent Money with My Life

I've Been Completely Stuck in a Book Vortex Lately😫

I want to read a book similar to "The system gives me immortality, and I will eventually become invincible while I'm alive (Ember of Immortality)". Dear bookworms, please save me! Whether it's niche or classic, healing, dark, or brain-burning, just come and hit it! Hurry up and find the treasure at the bottom of the box.