The Mountain of Light
The Mountain-of-Light is a living mountain in the far south of The Elder Continent.
General knowledge
The Mountain-of-Light is many things. It is a mountain far to the south of the Presbyterate. She is also a god called Stone. People from Varchas and some other places in the Elder Continent regularly make pilgrimages to her.
A Mountain-Sherd is a holy relic chipped from the side of Stone.
The Mountain is wounded. Its blood forms a river known to some as the Nameless River[1], but the estuary is called Adam's Way[2].
Mystery
Possible spoilers:
Mount Nomad is the child of the Mountain and the Thief-of-Faces. Mountain of Light is also the Messenger's daughter - or rather, the child of the Bazaar and the Sun.
Real world connections
The Mountain is likely named after the diamond known as the Koh-i-Noor, which means Mountain-of-Light in Persian. This diamond was once the largest in the world, and passed through the hands of the Kaktiya dynasty in India, the Persian Empire, and the British empire. Another diamond with a similar history but remaining in Iran is the Daria-i-Noor, or Sea of Light.
