User blog comment:Omega natsu2/Fairy Tail Episode 206: Panic of Library, Review./@comment-24622358-20141101051206

12 days to live in exchange for freedom. Maybe it's 12 days in the Spirit World so it's 3 years or 36 months in the Human World? Looks like Hisui has a collection of Silver keys, at first i thought that the box was the gift of Jude to Lucy in episode 124.