User blog comment:Anon421/Small Hints About New Weapons in Chapter 7 Part 2(?)/@comment-43604755-20191013070826/@comment-31479589-20191013084808

Hmm, it seems to me that the legendary shadow sword is really Dragon's Roar. Shadow Mind said the sword was in Emperor's possession, and guess what the Emperor used to fight Night Warrior?

Well, I could be wrong though. Although I don't think that mini-Desolator (if it's really that smaller) is the shadow sword everyone is talking about ¯\_(ツ)_/¯