He was a grandson of
Baydu. After securing
Shaykh Hasan's neutrality, Musa's patron
Ali Padshah went on to fight
Arpa Ke'un on Jaghatu plains near
Maragha culminating in the
Battle of Jaghatu on 29 April 1336. Arpa's army were led by 60 umara, notably Hajji Taghay (son of Sutai, Governor of
Diyarbakir, from Oirats), Uyghur commander Ögrünch, Torut (a son of Nari and relative of Narin Taghay), Ortuq-Shah (son of Alghu) and
Chupan's son Sorgan Sira. However, soon some umara, such as Mahmud b. Essen Qutlugh and Sultanshah Nikruz, defected to the side of Ali Padshah. Battle was a defeat for Arpa and soon after he was captured in
Sultaniya and killed. Subsequently, Musa was enthroned as the new Ilkhan, in fact as a puppet of Ali Padshah. Supporters of Arpa Ke'un, namely Hajji Taghai meanwhile went to
Jalayirid Hasan Buzurg, who in turn raised another Borjigid prince,
Pir Husain as an Ilkhan on 20 July 1336. Chupanid Sorgan Sira again changed sides and joined Jalayirids at the
battle of Qara Darra near
Van. A Georgian contingent under Amirgambar I
Panaskerteli, Duke of Tao also joined the battle on the Jalayirid side. Despite Ali Padshah's contingents defeating Hajji Taghay and Ögrünch defeating Surghan, Musa was standing on center and badly defeated. As a consequence, battle was lost and Ali Padshah captured and executed while Musa was forced to flee on July 24, 1336. Despite losing his patron, Musa did not relinquish his claim to Ilkhanate and retreated to
Baghdad, later joining forces with
Togha Temür in June 1337 and occupying
Soltaniyeh. However, he was soon captured by Emir Qara Hasan and killed on 10 July 1337. ==References==