@@L30GH05TDUD3 more likely the ending credits of part 1, the main music was revealed. EDIT: Guess I was wrong for assuming it to be used in part 1. Did not expect a song to be composed specifically for the video. See you when part 5 comes.
-It was used as a Trailer Soundtrack when Reimu and Marisa Fights. But it was a good idea to see shadow art once again while Retribution remix plays!- WAIT this is a separate arrangement, IT WOULD BE COOL AS HECC