Looking back at this room I sort of regret keeping it in the hold, even in the post mastery area.
So the story of the room is that it was designed around an aumtlich + broken orb idea I had (which I felt was really neat at the time, but have now forgotten). Once it was done I played it to make sure it worked and then I moved on to other rooms. But even back then I had a nudging feeling that finding the solution working through the room with fresh eyes would be kind of frustrating and heavily reliant on trial and error (as opposed to the backwards engineering of the solution I did when I built the room).
Anyway, later on I completely forgot the solution and I never solved the room again. It really frustrated me, but at that point I think on of the testers had actually solved it. So I made the conclusion that it was just a really hard but fair... fairish... hard room, and no DORD architect will ever feel comfortable with throwing away one of their toughest babies. (Maybe I was somewhat embarrassed to admit I didn't know how it worked as well). At the time moving it to the post mastery area felt like the perfect solution.
tl:dr Sorry this room exists and sorry this post won't help you solve it
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Voligner is my very own DROD-like game. Please check it out!