Ghast. Using methods similar to those outlined above for the ghoul, a necromancer of at least 14th level can create ghasts. However, these powerfully chaotic creatures are even more unpredictably violent than their weaker cousins, and thus much more difficult to control. For this reason, they are rarely raised except as an experiment. Afterward, they are either literally trapped in an area (to serve as unwilling guards), set loose into the countryside (where they promptly wander far away from their creator's domain), or simply destroyed.