Bloodborne DLC - Ludwig the Accursed
A boss from "The Old Hunters" DLC
First phase it just seemed like a boss with non stop huge range attacks, don't try and get too many swings in on him in a row unless he gets staggered or whatever.
Second phase I'm not sure how I was able to Viseral attack him, it made the sound and let me do it and I did not shoot him with my gun, but that helped me kill him faster for sure.
Either way he dishes out a ton of damage in pretty big spaces.