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Revenants were undead creatures that would rise from the dead to hunt down and slay their killers with an unwavering zeal.
Appearing as decayed and emaciated versions of their once-living selves, revenants typically had open festering wounds and drawn, clammy skin covering their flesh. Ordinarily, revenants had lifeless eyes but when faced with their murderers their eyes would flare with an unnatural light.
A revenant possessed greater physical strength and a stronger force of personality than they did in life. Along with the usual differences between the undead and the living, revenants were also impervious to the effects of acid, gases, cold, electricity and polymorphing. Accompanied by their resistance to non-magical weapons, this all made revenants particularly tough physically.
Revenants were single-minded in the pursuit of their killers and although they had a number of resistances and abilities they were especially potent against their murderers. In addition, they still retained all the powers, experience, and special qualities they once had in life.
Revenants had an unrelenting desire for revenge against their killers, almost to the point of ignoring anyone else who was not involved in their murder. This desire for vengeance sometimes spread to accomplices involved in the murder, but they tended to be less important than their primary target.
Although revenants typically had no society or shared purpose, gnomes seemed to be especially likely to be hunted by revenants.
On Marpenoth 2 1372 DR, Irae T'sarran began research on her great revenance spell that could potentially raise an army of thousands of revenants under her control.