https://www.youtube.com/watch?v=fw55w2gXXzU

So I am observing this build. Fighter 12 / Barbarian 6 / Favored Soul 2. It appears to be shrouded, but it has Blitz so it must be dreadnaught. Where is that effect coming from. I am guessing some item, but which one. If not from an item, what is it and where does it come from?

Big Thank you to anyone who can answer this.