Ivar Evil-Eye

Ivar Evil-Eye is an enigmantic member of the Viper School and due to his title as the "Master Witcher" of the order, it is suspected that he either a high-ranking member of the school or its leader.

Any clarification of this is not possible as of now since the only written information featuring Ivar Evil-Eye is an unsent letter found by Geralt of Rivia on the mortal remains of the witcher Kolgrim, another member of the Viper School.