Brother Salasso

Before you fight him, you can also see him talking with a projection of the Black Abbot:


 * Brother Salasso: My lord, the illumination of the sacred text is complete. This chapter of the Great Work is ready to be bound with the others.
 * Black Abbot: You have served me well Brother, but I sense a disturbance within your crypt. Attend to it quickly so I may begin my ascension!
 * Brother Salasso: At once Master.