Crusader's fort is not primarily supplied by teleport, but that doesn't mean they don't regularly get them. Occasionally this takes the form of 5th circle wizards looking to sign up, but more often it's high value cargo and mail. A few days after the fort played host to a number of nigh-invisible insects, a letter comes in addressed to Eriape.

Eriape gets her mail in the little administrative office cubbyhole mailboxes. She picks it up, and returns to her private cell in the Evening. The badgers are in bunks, six plus six, leaving almost no space. Not that anyone of them actually sleep, but Eriape considers it important to Encourage Them to have their Own Interests.  

"Mail Call!"

"Did my Subscription to the Fiduciary Times come in?"

"Did I get a Reply to my Complaint Letter?"

"Yes, and No. I don't think you're ever getting a reply from Aspexia Rugatonn. I did get a letter to Me!"

"I am going to Keep Trying. What is your Letter?"

The letter is from a wizard named Nestoras Chrysanthou! People with a good grasp on the inner sea wizarding social scene will be able to identify the name as corresponding to a wizard of some ability who had to relocate out of Absalom after losing an academic squabble; he continues to participate in the republic of letters from what he claims is a private demiplane and what his detractors claim is merely an underground base with delusions of grandeur. People without such knowledge will only have what they can see from the letter itself, which is enough to make it clear that he's at least 6th circle and more than passable at necromancy. Within the letter - after the usual pleasantries congratulating her on her move out of Cheliax, which every self respecting wizard considers to be nigh-devoid of any actual magical merit - is some discussion of her personal research. The writer purports to be very impressed at her sentient badgers, and inquires after her interest in any spell trading or research collaboration.

That is Interesting! Will you Do it?

"I Guess I must get used to Being in High Demand, now that I am a Well-Known Worldwound Wizard! Yes, I Rather think So"

Eriape writes a letter back in her Style, explaining all about her new spells, including her arcane Speak with Dead, Awaken, and so on. She invites him to visit if he likes, as scribing scrolls gets expensive. 

Does he want to do that? Speak with dead is a little interesting, but - 

...Apparently he does want to do that, but speak with dead isn't why because plenty of arcane spellcasters can do it. That's news to him.

A few days later, another wizard shows up at the Crusader's fort. He's not detectably evil, but that doesn't mean much since he's also not showing up to any other magical detection method either. Yes, he's here to speak to one of the adventurers here, yes he can swear under truthspell that to the best of his knowledge he's not working for or with any demons, yes he's willing to follow the rules or else leave. He's also got a couple of helpful spells prepared if that changes the outcome here, will they be less upset if he's willing to supply some communal phantom steeds and greater magic weapons and such for the fort?

No, that's exactly the kind of person we don't allow inside the walls, because we're not idiots, see.

 This is discrimination, he's not even an undead! Or provably evil! Or wanted in Lastwall for anything! What it's not is surprising; he's just here so he can say he tried. Sending to Eriape:

Your Paladin hosts refused visitation. Meet at my base or neutral ground? Can provide transportation if desired.

She's not going to take the first or third offer herself, obviously, nobody gets to 6th circle without being smarter than that. But you still ask, and she might send him a minion whose eyes she can watch through or something.

"We can meet Just Outside the Fort! I can Bring with me Several of my Friends from the Fort to make it Safe!"

Sure, that works for him. He'll pick a spot in view of the fort that's far enough away to not be immediately concerning to throw up a tiny hut to keep off the wind before stone shaping some furniture and getting a folding chair for himself out of his bag of holding. If she's going to be a bit, he can put up a private sanctum, but he's personally protected and has detect scrying up to catch anyone trying to snoop.