His successor, the amir Bogha, conspired against Arghun and was executed.
But he committed the tactical error of appointing a disproportionate number of Jews and Christians as revenue officials, and thus made many enemies among the Mongol nobles, who had him assassinated in 1291 when Arghun was lying fatally ill.
To send a mission to Arghun with a view to a new crusade.
The reign of Arghun was also disturbed by a rebellion of a grandson of Hulagu, Baidu Khan.
Arghun died soon after the murder of Sad, and was succeeded by his brother Kaikhatu, or Gaykhatu, who was taken prisoner by Baidu Khan and killed (1295).