Doomsday: I Became a Big Shot by Reviving

When the apocalypse struck, others awakened superpowers, but Ye Xiaoyun awakened 'infinite revival' at the cost of experiencing 100% real death pain. While everyone else was fighting to survive, he was researching which way to die was more 'dignified', until he discovered that each painful death was accumulating hope for life. — Description from novelcodex.org