The Lord of the Mountain is the best horse that you can ride in The Legend of Zelda: Breath of the Wild, and, while the holy creature cannot be registered at a stable, it is the fastest way to travel around Hyrule – aside from warping, of course.
The Hyrule Compendium describes the Lord of the Mountain as a noble creature that watches over all animals that make their homes in the forest. Legends say that this holy creature is a reincarnation of a sage that died on the lands it now protects. It is said to have an acute awareness of its surroundings, and, therefore, it seldom appears before people. The Lord of the Mountain is sometimes referred to by its other name, Satori.
But, where can you find the Lord of the Mountain? When night falls, look across at the Satori Mountain which lies west from Hyrule Field. If you can see a turquoise light shining into the night sky, then it has appeared there.
Travel across as fast as you can, but, as you near the Lord of the Mountain’s location, start to move more slowly. It can be easily frightened, and players will need to be at their sneakiest to have a chance at riding it.
The Lord of the Mountain stands peacefully beneath a cherry blossom tree, surrounded by Blupee – small rabbit-like creatures that glow with a mysterious blue light. Move slowly behind the noble creature and then approach it, preparing to tap A to mount it before rapidly tapping the L Button to soothe it.
This will take some effort, normally requiring two complete Stamina Wheels before Link will be able to subdue it. If successful, you can then ride the Lord of the Mountain for as long as you like. Those looking to complete the Hyrule Compendium should also remember to take a picture of it before they leave it behind somewhere.