Talk:Hibernation Cave/@comment-78.72.141.165-20120206190009/@comment-4819518-20120207034627

It is essentially a holding pen. Specifically, when you're trying to satisfy the Shrine requirements by maxing out the dragon levels, this allows you to keep some rather than sell them all off. This, in the long run, makes it easier to raise them to level 15. Hope that answers your question!