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1.) placing the first decoy at 3,20 (small island on the western side)

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2.) placing a mirror at 28,27 to block the sight of the evil eye.
this is necessary to get rid of the crumbly walls

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3.) placing the second decoy at 27,30 with his sword over the pressure plate.

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4.) to wake up the evil eye, i have to destroy the mirror

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now i want to have to evil eye on the pressure plate at 10,23 with beethro north of it. the plan is to move beetrho north in a zig-zag line to lure the evil eye on and off the pressure plate.

×The easiest way to do this is to get the evil eye on your left. This is simple to do with a two-tile obstacle, and conveniently a decoy serves as one.
Of course, the eye will then be attracted to the decoy, so you have to do this in a place where you can then destroy it. The mirror can be helpful here.

×One tile south of the southwest pressure plate, facing west.