Pokemon Hidden Fates is a special release of cards from the Sun & Moon series. The set contains cards from the Japanese GX Ultra Shiny and Sky Legend subsets. The special Hidden Fates release includes a shiny vault subset, which mostly consists of Sun & Moon reprints.
Hidden Fates is regarded as one of the best Pokemon releases of the last years as it includes a lot of popular Pokemon and great artworks. As with all special releases, booster packs are not sold separately and are only available from these exclusive Hidden Fates products.