This weekend is the prerelease for Dark Ascension, the second set in the Innistrad block. Starting next week, we will be focusing on a lot of new Dark Ascension cards–how they work and how they interact with each other.
Prior to the release of each set, a Frequently Asked Questions document is released, which covers the new mechanics and themes in the set, as well as issues with individual cards. You can view or download a copy of that FAQ here. Many of the mechanics and cards in the FAQ will be covered over time in this blog, but if you are going to a prerelease this weekend (and I highly recommend that you do), then it may help you to look over the FAQ beforehand.