I know this is more comedy and usually in this kind of novel the world building gets largely skipped over. But I still would like to know how a person got picked as the 4 Heavenly Kings, why the heroes kept trying to kill them when those guys literally can't be bothered doing anything remotely worth killing over, why doesn't he kill the heroes(is it personal value or something else), would the heroes even kill them or just like they did to them, they will just beat them up and declare them defeated?