Have you ever wondered what would happen if you became a follower of the Daedric Prince Molag Bal before discussing him with Serana? I wondered if completing Molag Bal's quest would unlock an additional response. To test this, I went to Markarth and took on the Daedric Prince's task, where he sent me to free the priest of Boethiah to later subjugate him and make him a follower of Molag Bal. After releasing him, despite the cell being locked, the priest simply teleported through it and went about his business. I chased after him, and with Molag Bal's influence, we compelled him to change his allegiance. The quest was successfully completed, and I hurried to Serana to talk to her. Here's what happened in my case.