Discussing Teb Tengri and the Religious Views of Chinggis Khan
"Included is discussions of historical sources (Juvaini, Rashid al-Din, the Secret History of the Mongols) letters written by Hulegu Khan and Chinggis Khan's views (or lack there of?) towards Buddhism."
"In the early days of the Mongol Empire, Chinggis Khan relied on the support of an influential shaman named Teb Tengri. But the Shaman soon became a threat, undermining the rule of Chinggisids and seeking to turn Chinggis Khan's family against each other."