Forbidden Power

At the start of the War of Souls, the cataclysmic Necro-Seism of Nagash swept through the Mortal Kingdoms, imbuing the world with the power of the ether. Incantations now unleash an unheard-of force, inhabited by a terrifying consciousness. But beware, for the persistent spells thus generated can just as easily turn against their creator as wreak havoc on enemy ranks.