Tengriism

Tengriism is the ancient religion of the people of the Eurasian Steppe, possibly being the oldest religion in the world, depending on if you count various adaptations and migrations as still being fundamentally the same religion. Tengrists worship Tengri, divine personification of the Sky, and believe nomadic pastoralism to be the most fundamentally honorable lifestyle. Today, many people across the Mongolian Khanate and throughout the Wildling Tribes still worship the religion fervently.