Warning: Spoilers for Batman #153!For as outside the law as Batman is, he has a ton of rules that he requires every member of his Bat-Family to follow. The key rule, of course, is his no-kill rule. However, there are some smaller rules that fold into this overarching rule – namely, the use of guns. But when a new hero shows up in Gotham, firing away at criminals, he challenges everything Batman stands for.