I do not know if this has been said or theorized before, but here is an idea I had thought of other day. Those exotic armor pieces that seem to be nowhere in sight might come from the 3 challenges that have yet to be activated for the Kings Fall raid. Its pretty simple really; -There are 3 exotic armors for each class that are in the armory, but have yet to really be seen except for one or two posts about them. -There are 3 challenges that have yet to be activated in the Kings Fall raid. So my theory is each challenge rewards you with one of those exotic armor pieces depending on what class you are when you complete them. Thoughts?