Collapsible option for duplicate cards, different card # scenario

So, love the site so far, but I have a request. Would it be possible to allow for a collapsible field for duplicate cards?

For example, I am one of those nerds that likes to specify the edition number/card number for each entry I put in, and it'd be excellent to have one row showing for the more generic cards, especially lands.

Thanks for everything deckbox is so far, and everything you plan on it becoming!