He feels an open summons and lets it grab him -
"If it's not immediately visible, we can ask for directions. Politely and/or terrifyingly."
"Oh, now that's just evil. You don't see me quoting Brittonic epics you've never heard of. Well, mostly because current Brittonic epics aren't any good. But the point stands!"
"If you did it I could likely just make them. I'll make you the book I quoted if you like. Actually, I'm not positive the line's in the book, it might just be the movies, but I can make you those too. But right now we're busy."
That circle of monoliths has got to be our landmark. See anything that looks like a High King might live there?"
"Hmm -" Cam banks for a better look. "You'd know better than I would. That thing?" Point.
The thing is not obviously a castle, but it is taller and more fortified than most non-kings have reason to care about.
"I'd suggest walking up and asking if the person we're looking for is here, but I haven't got the faintest idea how to pronounce the man's name."
"'Go and tell your master that we have been charged -' - sorry, that one's definitely after your time. Also it is an extremely irreverent comedy with King Arthur in it."
That line might work. It'd get us to a king at least, eventually. I thought if Ireland has a king of kings we may as well make use of him, but really any one could do."
"Feel free to plagiarize Monty Python, they're some awkward combination of not yet born and already dead and either way cannot complain."
"Then let's try it. Once we're in front of whoever sits in the big chair, I'll demand to see his boss. If he claims not to have one, he's our guy."
"Right. Would you like a glowy rock to hold so it looks more like you're magic than me and I can knock people over without it looking like I'm doing it more freely?"
"Glowy rock, good idea. Not sure how that lets you knock people over more, but it'd help draw their attention."
"Glowy rock provides a focus for ambient magical effects which is clearly in your possession." Hank gets a piece of quartz with a blue LED in the middle of it. The color of the light shifts slowly to green.
"Perfect. Here's hoping it goes better than last time."
Hank knocks on the door. It's common knowledge that a knight in black armor means Adventure and should be let in. That goes double if it's scary-looking armor. The door opens.
The answer he gets is "I am Muirchertach mac Muiredaig of the Goidels, High King of Ireland, and I answer to no one," so they're in the right place.
"You will soon." Hank raises the Glowy Rock and gestures toward Muirchertach mac Unpronounceable.
And then abruptly both Hank and Cam are thrown hard into the nearest wall.
Hank is stunned in multiple meanings of the word. The next thing he knows is that his vision is swimming and at least this helmet is pretty cushioned, by armor standards. After what seems to be no time at all, he finds himself on the ground wondering whether anything happened while he was out.
The fairy shrieks.
"If the king's your summoner and you like him enough to work for him," Cam tells the fairy, "you do not want me unsummoned, right now. You want me to denature the poison in the capsule in his stomach before it dissolves. It is too big for you to get it out through his throat without killing him. Are you calmed down? Can we talk?"
"Y-yes," says the fairy. "Oh, please put the lights back on."
Cam reignites one of the fires.
"If he's her— she's a— a mover?"
The fairy, still glued to the floor, nods unhappily.
"He's completely safe unless I am unsummoned or I decide to stop adding layers to the capsule," Cam tells her.
Everyone asleep, good. Mover captured, better. They're not in any immediate danger then. "But," Hank asks her, "if the king of Ireland can summon daeva, why is he only king of Ireland?" His entire plan for international relations depended on being unassailably more powerful than everyone else. Muirchertach could be a problem.