Blackgaol Knight is one of the new Great Enemy Bosses that you will face in Elden Ring Shadow of the Erdtree. He can be found in the Western Nameless Mausoleum and will be one of the biggest ...

start heading to the west, where you'll see the entrance to a mausoleum. Get inside, go down the stairs and interact with the mist to find the Blackgaol Knight.

The Greatsword of Solitude can be obtained by defeating the Blackgaol Knight inside the Western Nameless Mausoleum in Gravesite Plain. Check out the map below for the exact location.