Class F Flame? I Burn to Become Stronger and End the Era

(Hot-blooded + not brainless + decisive in killing + plot-oriented,) The spiritual energy is revived, the wasteland invades the human world, the monsters attack the human living area, and human beings are struggling to survive. The human world is divided into two. People in the outer city live in dark corners, always worried that they will be invaded by monsters and infected by desolate corpses. Lu Ran, who awakened the F-level flame, accidentally discovered that his flame burned the corpse, and he could obtain one percent of the host's spiritual energy value during his lifetime, and he could increase the intensity of his own flame. Not good at level? "Burning the corpse will directly increase your strength quickly! Not talented enough? "My talent has grown directly from F level to SSS level" The technique is not good? "I have all the martial arts and martial arts above heaven level, so you can fight me with anything! " If there is no light from now on, I, Lu Ran, will be the only flame