If you played the dark below, you will have noticed that the knights that used to spawn no longer do. This isn't much of a problem as they didn't offer to much. However, the wolves that prowl in the patrol do, they are the main source of keys. If I am right the only other way to get a key is to do the taken king missions, but this can only be done once for a key. Will the treasure in prison of elders eventually become unobtainable in the taken king? Surely Bungie wouldn't create an entire mode and make it pointless, would they? What do you think? Edit: Also, how will you make progression in the Queens faction when the wolves stop spawning? Will that be obselete as well?