>>473
https://discussions.ubisoft.com/topic/162539/unable-to-open-cell-door-with-key-in-anderitum-raven-challenge-when-the-key-is-stolen-post-here?lang=en-US&sort=newest_to_oldest

ちょっと前に更新されて詳しく載ってるようです
試練を繰り返すが重要なのかな？