Old books whose origin cannot be identified are mostly useless in [Foreign Lands], but a small number of ancient books are the kind of buried mines and unexploded bombs.

I don't know when it will explode the thing that smears your face with blood.

Generally speaking, there are no traps in ancient books and old books. Even if something is sealed in that book, there is enough protection and it is relatively safe.

but can't stand the first one

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