Just finished playing (and winning! :D) the game! :)

Just as an aside, the title immediately made me think of The Textorcist (a nice boss-only word-typing bullet hell). X)

Some comments:

1. I love the atmosphere, including the humour — the dodecahedron drawing line sounded like an ode to programmer art. XD
   
2. I managed to win/accomplish the first diexorcism on my first try; I usually find dice/card/random games difficult (because you have to remember a lot of rules and whatnot), but I thought this one was surprisingly intuitive and pleasant! I felt the mechanics were simple enough and few enough to be understood quickly, and relatively balanced at first glance (this needs confirmation through more testing).
3. Weirdly enough, I managed to win the second diexorcism / dark ritual very easily, by merely throwing my doubly cursed die, losing only two rounds! So, maybe znart was unlucky the day he played (or I was not!), but the game is winnable. For having played some very hard games during this game jam, I must say this one seems entirely reasonable to me, both in intensity and length.
4. Haha, I do not know whether this is on purpose, but after the end, you can throw as many dice as you want. I engineered a dice rain on that shadow. XD
5. The setting is beautiful, but as ScolonDev remarked, this comes at the price of heavy memory usage. Maybe some optimisation was possible (some deactivatable modules, some rendering options…)? (Anyway, this is what you get for selling your soul to the Devil of high-end 3D game engines instead of going with low-level frameworks. :p I have dabbled a bit with MonoGame, by the way, I think it could be interesting for 3D game jam prototypes, although I have yet to leave my semi-comfort zone once again and dare trying!)
6. On the originality side: I think it is original story-wise. Such a funny spin with exorcism is precisely in the same vein as that of The Textorcist. Nevertheless, gameplay-wise,  it is more of a simple game of chance, as several other entries have also offered.

I liked the game, I think you may be on to something. :)