What happened to the music that played at the end of Act 3?

During the beta phases when Act 3 had just been finished, the moment you killed Karroz and before you spoke to Bourbon, there was some music that played that I haven’t heard again. I recall asking what the song was back when it was introduced, but nobody had an answer, so I’m wondering if Crate can chime in here and either say what it was or if we will hear it again.



you can actually hear it whenever you fight the Boss of the hidden quest (do not mix it up with the hidden Path)
Video Guide

I knew it sounded familiar. I loved that secret area in TQ. I was hoping they would bring it back to Grim Dawn in full. Thanks for the link.

Edit: I don’t know why Chrome deletes links when I quote…