Ah yes, I've heard this one being shared in the Discord!
I appreciate how you start out with raven-samples to get into the right vibe, to then not use samples anymore for the actual song. I love your "atonal woodwind stuff", it works really well for bird-sounds! I don't hear the "flapping" through the strings, but that's okay. The song has a definite unsettling, evil, and almost transcending vibe to it through the epic choir and orchestra. There is little variation in the song, but I actually don't mind for once! I'm not sure what you did to keep things fresh, but you did it just fine. Cool song :D