Review Detail of Phantom_X143 in In Marvel with template system

Maybe I should start reading the reviews before I read the novel. I mean I have no problem with MC having a heroic personality and saving others but saving others at the cost of oneself? Atleast give an introduction about how he became like this. Like what makes him give up his life for another? I can understand the sacrificing oneself to save the world thing but to save a single soul? And I didn't even read past the Ch1.