Black Mountains - Prison Island/Night

Black Mountains - Prison Island/Night is Disc 9, Track 10 on the Xenoblade Chronicles 3 Original Soundtrack and Disc 20, Track 10 on the Xenoblade Chronicles Original Soundtrack Trinity Box. Black Mountains - Valak Mountain/Night is a version of this track with less instrumentation, in particular less electric guitar.

It is the area theme for during the night. The track is smoothly transitioned into from the equivalent part of Black Mountains - Valak Mountain/Night when using the Ether Slide to Prison Island, and vice versa when taking the slide back.