Is it available or every mode?
I have some suspicions or where it could be or what it might involve but don't want to spend hours searching if it isn't available on Ataraxia (easiest).
If it is available on every mode does it involve
a. the room of confusion or lone in vampire mansion?
b. a locked door that requires lots of key testing
can't wait to find it, if other people are looking we can exchange strategies here