There was a misterious light on the top of a pic. It was aquamarine and appeared during certain times of the day. Intrigued by this, I went all the way towards that mountain peak. On its top, there's a pond with a cherry tree an many Puribunnies all over the place. Then I saw it; the Lord of the Mountain.
At first, I didn't understand its shape. I looked like a horse, but with some interesting features. I came over him from the skies and it took a lot of energy to tame this spirit beast.
It reminded me the Spirit of the Forest from Mononoke Princess movie. It has a peculiar face compounded of two humanish rupi-bunnies faces. Its body is full of tattoes glowing all the time. The legs are similar to mononoke's spirit. I tried this magnificent being outside. It runs fast and the sprints are endless.
While it runs, every place where it steps flourish and glow, again, similar to the Spirit of the Forest. Sadly it is not registerable and in the moment I came down it dissappeared. It was fun dough, and part of the little details that make Zelda: Breath of the Wild mystical and fun to play!
Screenshots taken from my game.