The collection is complete... (Destiny)
I joined Cody in the last 15 seconds or so of his Nightfall, and managed to land a few shots on Valus before he fell.
As he was vaporized I said "I'll take one Hawkmoon, please."
I now have every last non-DLC Exotic in the game. Unlike Cody, I've actually beaten Destiny. And I didn't even have to grind three of the same character to do it!
... Now, about that House of Wolves...