You're thinking of Vittorio. Madrigal was a pawn for the Black Council, not a member. The ward cloths could very easily have just been enchanted with a powerful shield, no need for Immunity and the likes.
The point remains, he was a pawn. They often arm their pawns.
Also, the prevailing theory for Lord Raith was that he had some sort of Outsider related gizmo that provided his Immunity. If I'm remembering Blood Rites correctly the effects of it are directly compared to the magic absorbing effects of mordite, and Lord Raith is one of the few people we know to have had direct contact with He-Who-Walks-Behind so it's not beyond reasoning that it was Outsider related.
This is indisputably true. I address it above. My contention isn't that Lord Raith's magic immunity wasn't Outsider based...it's that
nobody ever made the assumption it was Outsider based which they obviously would've if that was the only source. Hell, Ebenezar definitely, and
probably Rashid knew of his immunity...if being in contact with Outsiders was the only way to get that they would've known.
It makes sense to me that Immunity to Magic is more of an Outsider thing, since that's their big schtick. Demons are nasty but impersonal and need ectoplasm to manifest, Fae are tricksy and weak to iron, Vampires can't stand holy stuff and drink blood (White Court aside). Outsiders, on the other hand, don't play by the rules of the Dresdenverse, and they're all but immune to regular magic.
I'm perfectly willing to believe it's very common (bordering on well-nigh universal) for Outsiders, and deeply rare aside from them...but it's clearly a theoretically available thing without dealing with them. Every reaction from some of the most knowledgeable people in the world says as much.
Lord Marshal Talos had to actively use his counterspell/shield spell during the Battle Above Chicago (whichever it was), so my bet is that he was just countering Harry's spells as he cast them, or just shrugging them off, since he was a Sidhe Lord with centuries of experience... I'd put him near the same level as Lea on the magical ability scale, and we all saw how powerful she was at Chitzen Itza. Harry got hilariously lucky when Meryl took him out, really. He didn't stand a chance of taking him on head to head without ruining his surprise.
We actually have no evidence he was anywhere near that powerful. It's possible, but a hell of an assumption. He was Aurora's flunky, after all, not Titania's. Lea serves
Mab in a similar capacity. I suspect those who serve the Queen's are a whole weight class up on those who serve the Ladies.
And he was trying to stay in-character as an Ogre. It seems unlikely he'd demonstrate a Sidhe-only power when doing that...he didn't know how much Harry knew about the Fae (ie: very little), after all. It seems more likely to me that he was indeed counterspelling under the Glamour and using that to mimic an Ogre's natural immunity.
