Birth of an Angel: These are some cool strings, and I wasn't expecting the synths till the next track haha. They sit really well over the strings. Beautiful.
Witch of the Skies Regret: That synth at the start is so cool. This is an amazing combination of textures, the choirs + strings + synths... Epic.
The Fountain of Faces: One hell of an atmosphere here. Very eerie. Love the Phrygian Dominant sound here.
Its Arms Bear Jewelry: I really like the guitar line, it reminds me of Nuclear Throne. All the percussion together at 1:35 is a really cool sound. And then the vocal samples that follow help build a creepy atmosphere. Damn, this synth swell... Too good.
Metal Puppet: Boss battle time! Very villainous swells around 0:30. I'm loving this bass rhythm. Everything is going hard after 1:40, love it.
Unraveling: Sounds like a mildly tragic conclusion, very effective end to the OST. I love the solo strings choice.
Overall this OST gives me post-apocalyptic vibes. Fantastic work as always, this was a treat to listen to.