Board Thread:Questions and Answers/@comment-73.32.179.25-20160527214429/@comment-8222987-20160531051255

Akrie wrote: (you'd need 1,000 purple crystals and 99 crystals to do so, and extracting treasures gives a various amount of purple crystals, S rank treasures giving the most). Yep, it's  100. However, if LINE is going to follow Kakao, then it's likely that only S Ranked Evolved Treasures can be extracted for the purple srystals/mystic pieces.