[quote=@Raijinslayer]
Hey, the antimage Magni guy is near the whale, right? Would he recognize the mark of a dark guild if he saw one, even if it was a real low-key one?
[/quote]

Oh, not really. He bases most of his hunting trips on rumors and tips from local communities to hunt down mages. They usually end up revolving around some type of dark mage and he also helps a community, win win. So, unless your guy openly states they were a dark mage, you'll be fine.