Returning to the End of the World at the Beginning, Can You Become Stronger?

[Apocalypse + Rebirth + Single Female Protagonist + Decisive Killing + Not the Holy Mother] A disaster changed the world structure. Mysterious power caused countless creatures to mutate, becoming a disaster that destroyed civilization... In his previous life, Xu Fei was framed and died, but his consciousness was about to disappear and he was reborn in the end. What? I level up by killing monsters, but you can become stronger by being struck by lightning? Cannon fodder armor: "God damn it, this is okay, is there any justice left?" Xu Fei: "You have to ask the King of Hell about this question!"