It has been several years since the events of Lord Tirek. And during that time several expeditions to the Crystal Empire were made, or to be more precise its surrounding area. But the harsh conditions of the North prevented much of the expeditions and they were cancelled. But one eventful month an expedition team took the chance. The object they were looking for, the horn of King Sombra, a powerful conduit for dark magic. Unfortunately for them, the horn was casting a dark spell in secret.