The Witcher Tournament was a tournament between Witcher schools. The Cat School was said to have betrayed the Wolf School, massacring members of the Wolf school. It took place in a special arena and King Radowit II who had been persuaded by druids from Mayena and his court magician Astrogarus then invited Mousesack and two other druids to attend. Astrogarus promised the Cats monopoly on killing monsters within Kaedwen in exchange for attacking the Wolves during the tournament. However, just as the Cats were completing this task, Radowit ordered his soldiers to shoot all of the remaining witchers of both schools in the arena. When the event went violent, Mousesack helped Geralt to escape the chaos.