I've killed dozens of the Blades of Crota, and not one of them has dropped this weapon for me yet. I was thinking, since it is a Common and you have to complete the Raid on Hard to get it to Exotic, that maybe Xur should sell it? For maybe 7 Strange Coins? Just a thought...
Alternatively, they could have Eris sell Husk of the Pit once you get to Rank 4 of Crota's Bane, for the same price. What do you think?
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Edited by dogfire45: 12/26/2014 6:49:03 PMI would say keep it as a random drop they actually do appear easily, just keep trying!