Is there an easy way to see which cards were added and removed between core sets?
For example, by looking up the card Giant Growth I can see that it was in both M10 and M11, but was not included in M12. Now on a single-card basis, it's not too hard, but I've got a lot of M11 that I want to go through and see which cards are still legal in standard, and searching Gatherer by card will get pretty tiring.