When Cersei learns of her father's death, she meets Qyburn, a disgraced maester stripped of his honors for experimenting on human subjects. Cersei takes him under her service and tasks him to treat Gregor Clegane. Soon Qyburn becomes the master of whisperers and begins conducting more experiments on people with Cersei's permission. When she gets arrested by the Faith Militant, he gets removed from the small council.