User blog comment:Hawkinz340/Who is Zzigg Zoldyck and who is Don Freeccs?/@comment-25032153-20140621083120

maybe when they were going to the dark continent the Hunters had to past some four step so they could go they were issued with a special lience which is the D Hunter which means they are legally able to go to the dark contentant as Dark Hunters. the hunters after the deaths changed this to black list hunter but they will open this lience and requirements need in the following chapters and link that to the three of the main Kurapika Gon and Kullia and how this has effected their families and also given that the red eyes that Kurapika is the last of are part of the need things to survive the dark contentant as well.