Board Thread:Update Suggestions/@comment-31561904-20161017070853/@comment-25856498-20161210165406

Finder Chest - Contains only 1 card.

Here's the catch: if your card collection is not yet completed, the card inside the chest is guaranteed to be a card that you do not have yet. This includes cards from any Arena.

If your card collection is complete, then it behaves exactly like a Legendary chest.

Once in a 500 chest cycle.