Described in the newsgroup a while back and recently reported: if
you had reflection and were invisible and had esp and were blind, Medusa
would turn herself to stone by looking at you. When you're invisible,
she shouldn't be able to see your source of reflection so shouldn't be
affected by the gaze; that's how things work when you aren't blind but
the relevant code was being skipped when you are.
Now esp is irrelevant for this and she'll see her reflected gaze
only when she can see you, regardless of whether you see it happen.
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