When I started this Idea I was thinking about how to make a room and lock it in the wild. At first I was going to suggest an expensive block that can only be broken buy the player that placed it, and is destroyed when broke. So it would be an EMC Store only item. But searching I found that new blocks isn't going to happen.So I think I know how it can be achieved with locked chests. But one component is missing. That would be a lockable Iron door in the wild.This may have been suggested before but I had trouble finding it via search so I thought I would throw it out there.