Death - 4 (demon with a severed head)
Horror - 1 (unclear thing)
But there is a possibility that after other "puzzles," more suitable stones will appear, which will help narrow down the range of problems. I think there is no other choice but to use Alex's body. You can start with the eye; maybe it will be possible to use it later for something else. Although, it is not a fact that the test will work on a vegetable, and it is not a fact that a demon will not also inhabit it later.
Ment, Ney, don't worry! Everything is fine. Now I am sure that this place is just playing tricks with perception. But Reiniss Reim did not expect that such determined guests would visit his haven. We are making good progress, but we need to remain cautious.