In the 1260s, as the Mongol Empire fractured into four rival khanates, one obscure figure — Negüder, a Chagatai prince — carved out his own domain in the mountains of modern Afghanistan. This episode follows Negüder's revolt against the Ilkhanate, his unexpected alliance with the Mamluks, and the birth of the Negüderi, a Mongol-Turkic confederation that survived for centuries in the Hindu Kush. We trace the political chaos after Hulegu's death, the Chagatai civil war that pushed Negüder toward the frontier, and his raids on Ilkhanid Khorasan that forced Abaqa Khan to negotiate. We also look at how Negüder's story illuminates the deeper problem: the Mongol ruling family's inability to share power, which turned brothers and cousins into enemies and made the empire's unity impossible. Along the way, we meet the historian Rashid al-Din, the battlefield of Herat, and the Qara'unas, the mixed Mongol-Tajik troops who would later follow Timur.