Not really an rng moment but I got dragons breath a few days after Xur sold it last, I was so happy because I was on vacation so I couldn't get it. I had a uncommon heavy in my inventory. I tried equipping dragons breath so I could dismantle the uncommon one... I equipped the uncommon one and dismantled Dragons breath. And I haven't seen one since. [spoiler]And at the time it was the second exotic that I had, my first was plan-c(but I love my plan-c)[/spoiler]