Then maybe I was wrong and it's not an organ
What I hear is some kind of "ringing" like instrument buried in the choir section that makes it a lot more intense than without it
It is a sequence of trill (BbABbABbABbA)(AAbAAbAAbAb) roughly an octave higher than the male choir
To further clarify my query, I have spent 5 hours isolating the instrument of interest
This is the instrument all by itself
https://www.youtube.com/watch?v=Ri2gTy7bqzo
This is how the music will sound like without the instrument
https://www.youtube.com/watch?v=U7z6B1p1ZvA
Any idea on what type of instrument or electronic music instrument that can produce this ringing timbre, because I frequently encounter this in other epic battle music that has some association with concepts like volcanoes, inferno, demons and the like?