Talk:The First Seal/@comment-223.19.176.195-20140330034157/@comment-205.178.58.13-20140926180309

You can keep it, or decompose it, a crystal is usually used to evolve beast cards.

There is a crystal stage once every week, so you don't have to worry about not looking for it again.

Plus, if you have a guild, you can get crystal eggs from the guild stages as well (anytime, the catch is that you need guild keys, which you can get 5 each every 24 hours).