You probably already know what I sampled the "Monster" voice from. I tried to make a song with a little bit more "meaning" to it.
At first the monster sounds annoying, shrieking against the music. When it starts shrieking more in beat with the music, it almost sounds like singing. Afterwards, it slowly breathes itself out in the distance.
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.