The Little Catcher's Road to Immortality

Cultivating immortality on a continent that has been overthrown by the immortal world? Stop being ridiculous! Even if you are a genius, you still can't do it if you have thin spiritual energy and still use the old skills! However, these evil cultivators have used all possible means. I don't want to become someone else's nourishment, and I want to seek justice from them... (No system + no cheat)