Ketboga’s ambition was not yet fulfilled, although he was now supreme ruler. He first demanded homage as regent; as he met with no opposition, he conceived the idea of setting the sultan, Nasir, aside; and he hoped to carry out his plan with the assistance of Lajin and Kara Sonkor, El-Ashraf’s murderers, and their numerous following. He had the pardon of these two emirs proclaimed, whereupon they left their hiding-places and joined Ketboga, for it was to their interest also that the sultan should be put out of the way. This coup d’etat was a complete success (December, 1294), but in spite of these plans, Ketboga’s reign was both unfortunate and brief. The old emirs were vexed with him because he raised his own Mamluks to the highest posts of honour, and the clergy were displeased because he received favourably a number of Mongols, although they were heathens. The people blamed him for the severe famine which visited Egypt and Syria and which was followed by a terrible pestilence. Several emirs, with Lajin again at their head, conspired against him, and forced their way into his tent while he was on the way to Syria; overpowering the guard, they attempted to get possession of his person. He managed to escape, however, and so saved his life and liberty, but Lajin obtained possession of the throne, with the agreement of the other emirs. In spite of his advantages, both as man and as pious Moslem, and in spite of his brilliant victories over the princes of Armenia, Lajin was murdered, together with his successor, and Nasir, who was then living in Kerak, was recalled as sultan (January, 1299).
Nasir was still too young to reign alone; he had to let himself be ruled by the emirs who had already assumed a kind of regency before his return. At the head of these emirs stood Sellar and Beybars Jashingir. Distrust and uneasiness existed between these two, one of whom was regent and the other prefect of the palace, for each wanted to assume the chief power; but soon their private intrigues were put into the background by a common danger. The Ilkhan Gazan was actively preparing for war against the Mamluk kingdom because the Governor of Aleppo had fallen upon Mardin, a town belonging to the Mongols, and brutally maltreated the inhabitants; also because the refugees from Egypt and Syria assured him that the moment was favourable for extending his dominion over these lands.