By the end of 1719, friction arose between Nizam-ul-Mulk and the Sayyid brothers. Nizam-ul-Mulk killed Dilawar Khan (Syed Hussain Ali Khan's agent) at the Asirgarh Fort in June 1720 and killed Sayyid Alam Khan, a relative (nephew, brother's son ) of the Sayyid brothers, in August. Hussain Ali Khan decided to march to the Deccan Plateau, and Hassan Ali Khan agreed to march towards Delhi. Mughal emperor Muhammad Shah also started for the Deccan from Agra. A few days before Shah began his journey, a conspiracy was hatched at the royal camp to kill Hussain Ali Khan. The chief conspirator was Muhammad Amin Khan Turani, an uncle of Nizam-ul-Mulk. Khan switched his allegiance to the conspirators, for reasons not documented in contemporary records. According to historian Ashirbadi Lal Srivastava, "worldly riches and power" were the reasons behind Khan's decision to change factions. Khafi Khan writes that Khan was incited to join the conspiracy due to his anger at the murder of Farrukhsiyar. The conspirators met frequently to outline a plan to assassinate Hussain Ali Khan, who was killed by Haider Begh Daulat on 8 October 1720. The following day, Muhammad Shah held a royal "durbar" and rewarded Khan and his co-conspirators. He was given the title Saadat Khan Bahadur (lord of good fortune), and was promoted to 5,000 "zat" and 3,000 horses. According to an anonymous Persian historian, Khan plundered Hussain Ali Khan's treasury with the consent of the Mughal emperor.