李惠宗
In 1217, Emperor Lý Huệ Tông suffered a serious illness and became mentally ill. He occasionally called himself the Heaven General and would dance all day long holding his sword and shield. By this time, most of the court matters are managed by chancellor Trần Tự Khánh and not by the emperor anymore, the court power base gradually switched to the Trần clan. In 1223, the chancellor Trần Tự Khánh died, Trần Thừa replaced his position and was given even more privileges from the Emperor.