"Howling Abominations" CCFF7-R OST 52

This song only plays in battle caverns underneath Banora during battle. Track is pretty lit tbh.

To unlock the side dungeon and get the trophy you have to leave the cave of oblivion and come back tcheck the last 2 crystals again.

You can purchase Crisis Core Final Fantasy VII Reunion here: https://ffvii.square-enix-games.com/en-gb/games/crisis-core/#buy-now

As of the release of this video, no official soundtrack for Crisis Core Reunion has been released (to my knowledge). Buy the original Crisis Core soundtrack here: https://music.apple.com/us/album/crisis-core-final-fantasy-vii-original-soundtrack/266734037