Beginning with the Magic: The Gathering core set which will be released on July 17, 2009, Wizards of the Coast will be making a number of changes to core sets. In preparation for the core set launch, we wanted to outline for you the changes that you'll see when the next core set is released.
Beginning with the upcoming core set, we will no longer be using "Nth Edition" to identify core sets. Instead, we will use a year designator. The July 17, 2009 release will be the Magic: The Gathering 2010 core set—Magic 2010 for short—to reflect the upcoming year.
Beginning with the Magic 2010 core set, all Magic core sets will be releasing annually in July instead of biannually. The core set currently scheduled for release in July 2010 will follow the same pattern and will be the Magic 2011 core set.
Unlike previous core sets, which were all reprints, the Magic 2010 core set will have approximately 50 percent brand-new cards. Following in the footsteps ofTenth Edition, all core sets going forward will be black-bordered. Also of note is that planeswalkers will appear in the core set for the first time starting withMagic 2010. The set size and rarity mix will still follow our new guidelines as announced last year. Magic 2010 contains 249 cards, including 15 mythic rare cards.