User blog comment:Tricoro/December 2015 Treasure Draw Season - List of Unobtainable Treasures/@comment-24956068-20151129182346/@comment-25889587-20151130043146

It's really uncanny for Devsisters to decide to remove 3 out of 6 possible crystal-generating treasure. As if they don't want us to have more crystals by spending those crystals.

All in all, those treasures is always relevant to the game and never become obsolete lol