User blog comment:SkullinBones1/Wizard Battle Royal. Turjan of Miir vs Caleb Widogast vs Raistlin Mejere/@comment-35680048-20191222002924/@comment-39845974-20191222005948

In these case of these guys, they don't innately sense magic without the usage of spells. Also, while I would say that Raistlin would able to see Turjan for a short time if he happens to cast detect magic while Turjan is invisible, it will only last for a very short while. Its not like the Detect magic spell is a long lasting passive ability, its a short term spell that only lasta a few seconds, and in the case of Raistlin can only be cast once.