Cool idea for a database feature.

So I have about 1200 cards entered into the database.  I use the database to build decks of my own and I also look at the decks that others have built and I try to build them myself. 

If the computer could look at all the cards I own and show me a list of decks (that others have made) which I already have the cards for I would be able to build decks from other users in a snap.  Basically the computer would compare the deck builds to the data base of cards.

Even fancier would be something that lists off the amount of cards I am missing to be able to make a particular deck.  I could just click on a deck build that I am interested in and it would give me a quick list of cards I am missing to be able to make that deck.

Just some thoughts.