Chaos Gun III requires Confetti Puches, currently you cannot make the recipe. The Recipe requires Black Powder, says it’s sold by a Heart vendor named Thegren Topjaw in Plains of Ashford. Hint also states ot’s sold by him after completing the reknown. Went to him on a 100% map completion char, no Black Powder sold. Seems like it’s either not activating correctly or just got skipped over and not put into his Merchant Table. Regardless, I can’t see/buy it, so my progression is at halt for now.