as bäki. They lived in Tuva and the Mongolian Khövsgöl Province; the Oirats moved south in the 14th century.

In one famous passage, the Oirat chief Qutuqa Beki used a yada, or 'thunder stone', to unleash a powerful storm on Genghis' army. The magical ploy backfired, however, when an unexpected wind blew the storm back towards him. During the early stages of Genghis' rise to power, the Oirats fought against Genghis