One year later, Abd al-Baqi served under the vakil Najm-e Sani, who was after a few months killed in Khorasan by Uzbeks. Abd al-Baqi was then appointed as the new vakil by Ismail I. Abd al-Baqi participated in the Battle of Chaldiran in 1514, where the Safavids, however, were defeated and Abd al-Baqi himself was killed. Another Iranian, Mirza Shah Hossein, was then appointed as the new "vakil" after having found Ismail's favorite wife, who was lost after the battle.