Five hundred years ago, the nations of the world tore themselves apart in a war that forced each of them to build barriers against everyone else. The people of Barestorm, who can move air at will, raised their entire kingdom into the sky and surrounded it with fog so dense it became a myth within a generation — every expedition sent to find it never returned. Wildspire sealed itself behind a vast and dangerous forest, where earth mages are said to have learned to take the shape of beasts. Icecrest fled to the deep north and built an ice wall so high no one has climbed it; the cold beyond kills most who try. Murgaz remains neutral — a healing ground for the wounded of every faction, protected by priests who command holy power. And Drardan, whose fire mages could incinerate anything, was contained by a spell cast by the Middle Kingdom that bars passage to any fire mage whose heart is not clean. With the fire kingdom calmed, the war quieted. Now the most brilliant mage in Drardan — Jabar, right hand of the Fire King — has been studying the ancient archives for a way through the barrier. He found one: Necromancy, a forbidden art that has gotten every practitioner killed. The legend of a sorcerer named Zuldtan who survived by opening a portal to another realm gives Jabar his target. He assembled his people. He opened the gateway. He brought Zuldtan back. The barrier is at risk. Now it is yours to protect.