When Impenetrable Master Fox Duurm had first brought the suggestion of checking Owen for black magic because of what Gary had said about the man having black magic as back up, his younger brother, Spell Master Juurn had been against it in the first instance. He told them the only way he could detect it was through physical connection when in fact he could detect from a distance without even coming in contact with the man except that he wasn't strong enough to use that kind of top notch spell. It could take up all the energy he had been saving up.
Apart from him knowing he was not strong enough, he had this fear of Owen he had told himself was irrational. He convinced himself it was simply because of the way Owen had treated him, smashing his head against the night stand that made him think in such a way.