These are absolutely laden with atmosphere. Great job on the production off the bat - one of the few entries I've heard that feels genuinely well-rounded and fully produced.
Loving the drum and bass vibes at the beginning of The Fall of the Scion of Rot. Some great synth textures to keep this driving forward, dipping into the sound-design territory. The hints of guitar work in this - be it the earlier palm-mutes or the distant riffing toward the end - does a fantastic job of setting up for the next track. The beat growing more complex and urgent as the track comes to a close only helps bolster this all the more.
The Expurgation Campaign delivers - same core sound as the previous track but more developed and, for lack of a better term, ballsy. Guitars being more prominent in this with some gnarly bass growls going really sets up that Mick Gordon trademark sound. Really like your use of various ambiences and textural backgrounds to fill in the spaces between.
Both of these are arranged really well and the choice of synth voicings is not only complementary but does a really good job setting the stage. Can't praise the production enough - everything sounds fantastic and sits comfortably where it should. Kudos, this was super solid.