The four new Planechase decks (Chaos Reigns, Night of the Ninja, Primordial Hunger, and Savage Auras) will contain all-new planar decks that contain a new kind of oversized card, and an assortment of new, Eternal-legal Magic cards. Let's take those one at a time. The "all-new planar decks" explain themselves. You'll get to visit planes you've never seen before as well as some old favorites. Long-time players will particularly enjoy this fact: there's a plane card for Shandalar! Next, the new kind of oversized card. These are phenomenon cards (plural: phenomena) that represent the sort of perils that lurk between planes. Here's one now!