Both Karn and Prince can detect magic in some form.

Prince eats magic, so he just naturally can sniff it out for hunting purposes. Especially very strong ones, or fire. (Like Master Jack)

And Karn also can track down scents. Unsure if magic would count as it could be just regular body Oder like most animals.

But yeah, I think most wizards can sense magic. Usually just not when they try and conceal it to avoid Magic Detection. Least from what I remember. Been awhile now