Harlan Tzara was a mage who appeared in the story Season of Storms. Probably the only wizard that has bald head. Impetuous and stubborn. Rissberg staying at the castle, where he carried out illegal genetic experiments, probably involved in them. Along with Pinety's commissioned Geralt mysterious case of a demon: indeed, in the surroundings of Rissberg, about 36 men between coalmen and lumberjacks were found dead and they suspected that someone in Rissberg sopummoned a demon which later escaoed and strarted killing everyone.