This room is quite tough with several initially unforeseen details, at least in my experience.
Here are two things that happen during the room's solution, the way I solved it:
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×The brain should block the thing corridor Beethro enters through, so that
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×the Slayer becomes stuck.
Also
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×the Slayer's hook should freeze the Aumtlich, to resolve your eye killing issue.
Even with those, the rooms is not easy, but I hope it helps to get you started!
