Doing the daily today and after dismantling the third piece I decided to take a short cut across the court of Oryx. When I did the guy that looks like Crota spawned and 2 yellow bar witches. I'm sure someone else probably knows what the deal is but, I've never seen it before. I was soloing it and by the time I finally got the 2nd witch down the mini-Crota guy dissapeared. Do you get something for defeating him? Should I come back with a fireteam and try it? Edit: majority opinion seems to be: 1) it's an Easter egg type thing/ giving a preview of tier 3 CoO; 2) no sword bearer spawns and there is no known way to kill him