I would edit this part from number seven:
[quote][b]The Black engram drops random pieces of a set of 5 exotic guns. You have to earn 3-4 pieces of a gun to get it. so you would need multiple Black engrams[/b].[/quote]
You can make it to sound more relevant to the idea. Instead of random pieces of 5 exotic guns, maybe say "The Black engram drops a clue to a certain exotic item. and instead of saying 3-4 pieces of guns, maybe "Complete a set of specific objectives to get the corresponding exotic item the clue was referring to." It is your choice, and I am 100% sure that you will use something better than what I provided lolz. Keep up the good work my friend.
Oh and.... BUUUUUUUMMMMMPPPPP!!! Bungie needs to see this.