Uskhal Khan, Emperor Tianyuan of Northern Yuan

Uskhal Khan, born Tögüs Temür , was the Mongol of the Yuan Dynasty in Mongolia. He used the era name Tianyuan .

Although sources say that he was a son of Biligtü Khan, Tögüs Temür was his younger brother. He succeeded to the throne after Biligtü Khan died in 1378. He continued to press the Ming from the north, cooperating with Naghachu of the Jalayir in Manchuria. However, he suddenly faced a predicament in 1387 when Nagachu surrendered to the Ming due to a devastating famine. In 1388 he was raided by the Ming on the Buyir Nuur. In his escape to Karakorum, he was killed on the Tuul River by , a descendant of . This marked the fall of the Khubilai line and the rise of the Oirats.