How Can I Become a Miracle Doctor If I Just Breathe Some Dead Air?

[No system] [No golden finger] [Decisive killing] After crossing the mortal world, breaking through the world and returning, I thought I would knock on the door of immortality again. But I saw the corpses of immortals were like mountains, and the avenue was like prison. Only then did we know that the catastrophe of becoming an immortal was the last attempt by Heaven to save him.