Step 1: Load mission Fist of Crota normal difficulty on earth
Step 2: Ride sparrow through mission untill you find hive doing the ritual
Step 3: Kill the blade of crota (There are no requirements for the drop just kill it. Also it won't drop like silken codex or black wax once you kill it it will show up on the right side of your screen like how raid loot is given)
Rinse and repeat don't get discouraged after a couple of try's, I've been helping a friend and I'm almost at the 50 kill mark.
English
#Destiny
-
This is such a random drop. I think I got my first a few weeks after it was available and even then I was just doing bounties. Now i get one or two a week. I have 3, dismantled 3 more. I have a friend with 6. It's kind of crazy how it can drop so much and so little at the same time. I feel like the common denominator for me was the eris bounty though.