This is an optional room.
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×You need to take the roach over the Blue PP. To take the archer and kill the isolated eyes.
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×Don't forget to light the torch.
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×follow the orbs: The path is somewhat linear.
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×When entering the first time in the main area, zig-zag to the fire in the bottom. And strike the orb. this way You'll leave the path open.
More hints to come. This room is not easy.