This song was going to be used as the first boss theme in Legend of the Sages (currently still in development) but is being scrapped due to changes being made in the beginning stages of the game. I've been given permission to post it online. So, here it is.
You can also hear this song on Soundcloud: https://soundcloud.com/leviathan254/the-nebulous-knight-beta-version-unused-legend-of-the-sages-ost
You may only use this piece for commercial purposes if your work is a web-based game or animation, otherwise you must make specific arrangements with the artist.