Lhalung Pelgyi Dorje
Lhalung Palgyi Dorje was the Tibetan Buddhist monk who assassinated the Tibetan king Langdarma in 842 CE.
Palgyi Dorje was Padmasambhava's student. In Tibetan tradition, King Langdarma persecuted Buddhism in Tibet. To end this persecution, Pelgyi Dorje traveled to the King's palace where he surprised the King and killed him with a bow and arrow. Pelgyi Dorje then fled to Amdo or Yerpa, where he lived out the rest of his life as a recluse.
Regarded as historical fact, the assassination story is widely held in sources.
