Look, DIO is like an event. He spawns every hour and usually an entire server has to help kill him (Unless you have GER which can still do a lot of damage) and you always get a reward being a mask. (We're excluding Dio Brando [Sewer Boss] because of how common it is to see.) As I make this a new sneak peak has been released showing what seems to be Eldritch Horror as an NPC/Boss. Look Here: https://streamable.com/3phun. We cant forget to mention that Vampire Raids are coming soon to ABD that have a 1/500 chance per night. What I'm suggesting is that we have some kind of "Events" category to put all this stuff in.
Just a suggestion.
