A blend of two dubiously-termed styles—post-rock, emo—has been the bread and butter of Kansas-hailing brainiacs The Appleseed Cast since the late ‘90s. If you’ve never heard them, you might be surprised to hear how broadly that blend can be pushed. With each release, they redefine. Remaining true to form, Illumination Ritual all but abandons the droning structures and sweeping arrangements of 2009?s Sagarmartha for what hits like a return to the lively, visceral Mare Vitalis with the free-flowing creativity of the Low Level Owl discs in mind. In theory, that should be great. It is.