Okay, more hints. Only read what you need:
×There are two rooms in the game (both in the Overworld) that have ghosts. If you don't remember them, they're in:
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×4N2W and 4N1W
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×Of course, you still need to get from 'ghosts' to 'blind ghosts' somehow.
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×There's no ghost blindfold in the game, so you can't do anything to the ghosts themselves.
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×But you could potentially get the same impact by doing something to yourself.
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×Something that might make the ghosts 'blind' to your presence.
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×Final spoiler ahead:
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×Buy an invisibility potion from the 4N1E shop and then visit the graveyard before it wears off.
