* A newly-debuted Planeswalker must reach Ravnica to seek Kaya the ghost assassin's help with a vengeful specter, while Chandra seeks ancient machines that could breach the unseen barrier around Ravnica, and Garruk's tireless pursuit of the sadistic and elusive Tibalt may be Chandra's best lead. * Meanwhile, our new trio of Planeswalkers join together as their goals align, speeding off to pick up the trail in Emeria, the shifting Sky Ruin in Zendikar! * But should they succeed in reaching Ravnica, they'll face the master dominating Tibalt and Davriel, perhaps the greatest mage the plane has ever known…