Board Thread:Update Suggestions/@comment-31561904-20161017070853/@comment-25856498-20161021033127

Nest Chest - A Chest that is empty, but when first interacted with, will open up and fit all the other chests you have in the other slots (excluding tourney, free and crown chests), thus freeing up space for more chests. If chest slots are full when a Nest Chest is won, the Nest Chest automatically contains all four chests.

The Nest Chest's contents will be equal to the contents within the chests that it fits. It takes 2 days to unlock, and cancels the unlocking of the current chest.

Thus, its contents and guaranteed cards are variable.

About as rare as a Super Magical. After all, it is a QoL improvement.