Soo, this is completely unrelated to what anyone is saying, but I've been thinking about the first round, or game, or completion of the epitaph, or whatever you wanna call it. I tried to find ways to deny the use of magic in the deaths~
Spoiler for Potential first few anime episodes spoiler:
First six deaths:
4 people could have gotten together, and planned to kill 5 others-- Be it on a whim or a grudge, they wanted to kill them-- But after they killed them and hid them, one of them got scared, and planned to tell everyone else, therefore, the other 3 murders killed that person, hiding them with the other dead.
Death of Hideyoshi and Eva:
Someone-- Potentially Natsuhi-- knocked on the door. Eva went to open it, and sees Natsuhi/the culprit. Natsuhi/the culprit say they wish to talk to them--if it was Natsuhi, also she would be "apologizing" for stepping out of line previously. Eva lets them in, not aware they are holding a gun behind their back. Eva sits on the bed, Natushi/the culprit points the gun at her head, and kills her. Then gets into the bathroom and kills Hideyoshi. Taking the gun, the person leaves the room, grabbing the chain hanging on the door, and manuvering their hand so they can lock the chain lock from the outside, and closes the door. They then dispose of the gun.
Not the best, I might try and solve the other deaths in that round too~