The epic conclusion to the action-packed arc! It all comes down to this. Owen, Dana, Jon, and Sydney have to prevent Loki from finding the powerful Crystal Rune. That means they need to find it first, no matter what. But tracking down the rune is only the beginning. . . . Loki is taking his battle for power to the world of the Norse gods -- and he's bringing an army of Underworldly creatures with him, including a fierce ice dragon. The stakes are high: Dana's parents are m