Oh wow, this goes hard! Out of all the songs I have heard, this one definitely has the most traditional "boss battle" vibes to it and especially with the instrumentation it has a very strong epic kinda feel to it. I also appreciate the use of some horror cliches with how you write the organ, string instruments, and chorus.
Honestly when I was listening to this I couldn't help but imagine the old MediEvil game for whatever reason. Awesome job, this rocks!