However, according to Ibn al-Fuwati he had been given information about his religious mentor and perhaps the person responsible for Tekuder's conversion - Kamal al-Din Abd ul-Rahman.

He was described as a Greek slave of al-Musta'sim Billah, who rose in rank thanks to his skills at alchemy and met Abaqa to whom he was introduced by Aybak.

He arrived to the Jaghatu valley near Maragha to attend the qurultai for the election of new Il-Khan after Abaqa's death in April 1282.

[7] His first act was to clear Ata-Malik Juvayni of charges brought against him by Majd al-Mulk Yazdi, a vizier who accused him of embezzling state funds.

He came to Baghdad to spend the winter of 1282-1283 and restarted the investigation of the accusations of embezzlement which may have caused Ata Malik's stroke on 5 March 1283.

[7][8] As Arghun's dissatisfaction grew, he left for Khorasan in spring to gain the allegiance of minor nobles and amirs.

Qonqurtai was accused of conspiracy and was arrested by Tekuder's son-in-law, Alinaq Noyan - the viceroy of Georgia - on 17 January 1284, and was executed the next day.

An army contingent was sent to Jazira, from where Gaykhatu and Baydu fled to Khorasan, to Arghun's encampment while several emirs such as Taghachar and Doladai were arrested.

Ala ud-Daula Simnani, future Sufi saint of Kubrawiya order also fought in Arghun's army during this battle.

Arghun agreed to the terms and sent his brother accompanied by two amirs, including Nawruz into the custody of Buqa, then the most senior of Tekuder's commanders, on 13[10] or 28 June.

On the other hand, he lost the favour of Tekuder who started to invest his trust in Aq Buqa, another Jalair general.

Qalawun sent a reply on 3 December 1282 urging Tekuder to release the Sultanate of Rum from vassalage as a fellow Muslim.

Tekuder sent a second embassy, headed by his religious mentor Kamal al-Din Abd ul-Rahman to Egypt[11] from Tabriz in June 1283.