Board Thread:Off Topic/@comment-27082610-20170624011641/@comment-26397825-20170711144523

How does the information get put on the cards? Is it just him literally transcribing information he knows into the card, which anyone could do with a piece of paper and a pen? Or does it somehow get a bunch of information the user shouldn't know but can now read at his leisure?

And it reminds me of Kabuto's cards from the Chunin exam arc of Naruto. I'm not sure how useful it actually is though except as a study helper.