Kyle
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Zubr was a demonologist.
Magnus was a summoner... and he went to fight his own??? Nonsense...
Zubr was a warlock, or a witch, or a necromancer... but considering that a necromancer came to Zubr, he couldn't be a necromancer either...
Therefore, Zubr is a witch.
And if you read how he was executed, it says that many wanted to burn him at the stake, apparently hinting that he was a witch.
Кто состоянием своим доволен, тому жить весело. (с)Алекса́ндр Васи́льевич Суво́ров