I realise that I'm late to the party here, but I finally got round to doing the Izanagi's Burden quest. I'm now supposed to complete a rare black armoury bounty. Issue is, as most will know, that the only way to get one is by getting lucky when 'handing in' completed black armoury bounties. I'll admit that I haven't done that many black armoury bounties, but reckon I have done 20-30 in the past when I was playing the Black Armnoury content, however not even a single rare bounty ever dropped. As I now need to get one I hopefully (and optimistically) completed most of yesterdays and all of todays dailies along with the weekly and still no rare bounty. The general grind associated with the Black Armoury content, unlocking forges per character, grind frames, run back and forth to Ada-1 is more than enough that the incorporation of RNG becomes ridiculous.