Vanyel has a very quick back and forth with Leareth and then very gratefully Mindtouches the archon again. :There are devils in Corentyn and Kintargo transporting civilians to Hell. If you can go there - we can't spare the personnel yet, it sounds like - can you teleport yourself there...?:

Is his mage-barrier holding? 

The trumpet archon disappears. 

The mage barrier is holding; the civilians mostly don't have anything to take it down with, and the wizard who presumably set up the demiplane is choosing not to be present to fight about it.

Aroden can dispel the demiplane, which seems like the right call here, except that there are a lot of civilians who were just shoved through it and are now on the other side. It's obviously a trap to send people in to retrieve them, but - can Leareth or his mages do anything from the outside? 

It doesn't seem to be an anti-magic demiplane; Leareth's Othersenses work fine in it. He stretches them as far as he can, sensing for minds - that part is easier, his Thoughtsensing range is pretty long - and then pushing his mage-senses to their limit to see if he can compulsion any of them into coming back through on their own. 

There's a crowd of terrified civilians right on the other side and some of them can be made to turn around and come back through. They're white-faced and trembling and crying and holding little children and their loved ones who were no so compulsioned are screaming at them in confusion but they cross back into the mass of scared confused civilians on this side.

Being upset about it right now won't help, so Leareth folds that away for later. 

He keeps trying, pushing his mage-gift hard, focusing hard on each mind he can still feel and sometimes trying a second time when it doesn't take, until he's sure that he's gotten absolutely everyone he can. 

Vanyel helpfully makes his barrier one-sided so they can get across but not go back in again. He is finding this pretty upsetting. 

They're getting most of the civilians back through and then something appears in Leareth's Othersenses that is much more bright and magical than any person - it's not quite the thing Abadar is, but it's much much closer -

- the Archdevil Dispater, ruler of the second level of Hell, looks through the demiplane at them. 

:You should Final Strike right now: he tells Leareth, and when Aroden's spells reached out and seized you there was at least the half-second where it felt like you might be able to bat it away; this one is both stronger and carefuller than that, and reaches casually across the two planes that stand between them.

Leareth would not, on his own, have much if any hope of resisting that -

- but the compulsion laid on all of his mages is on him too, he had Nayoki do it to make it harder to break it himself, and it holds, and now he's standing perfectly still, expression slack, simultaneously utterly convinced that he needs to Final Strike right now and also unable to do anything. 

Aroden has been standing in view of the crowd, visibly looking like Aroden while the Companions keep going through the people, informing everyone as reassuringly as they can that Aroden will not harm anyone who surrenders or is captured. 

About half a second after the Archdevil appears, he's in front of the demiplane, and a small number of seconds later the demiplane is gone. 

Nayoki shoves several people out of the way to get to Leareth and then he collapses in a heap and she catches him. 

:I am not sure what that - being - did to him but it triggered the protective compulsion: she explains to Aroden. :I will try to set it right before I wake him: 

"Dominate Person lasts days," he tells her warningly, "if he were a human he'd only be able to send new orders on the same plane but I don't know what archdevils can do."

"Thank you for the warning." Nayoki is poking at Leareth's mind, trying to gauge how different and how much harder to dispel this looks from Dominate Person as cast by a human wizard, which she's seen in detail.

It's higher power, and more thorough, but it looks fundamentally similar to the thing Aroden can do, which is possible to remove with Golarion's Dispel Magic or Break Enchantment (and technically possible for a Velgarth mage to just snip, though this will totally kill the subject). 

Aroden casts Break Enchantment. (He has a lot of spell slots, and also a large number of Pearls of Power, so is substantially less limited on spells than his other wizards, and also better at enchantments.) 

Nayoki checks whether Leareth's mind is clear of it, and resets the compulsion, before waking him. 

He wakes up and is on his feet half a second later. :Wha– oh: He looks around at the closed portal and the crowd of terrified civilians. 

Yfandes is still trying to say reassuring things to them, although possibly a weird voice talking in your head is not inherently reassuring. What level of panicked do people seem? 

Well, see, they live in a state run by Asmodeus whose secret police will have them tortured to death for disloyalty and an hour ago they were told that there was a conquering army arriving and they should prepare to fight and get their families evacuated straight to Hell, and then the conquering army arrived and claimed to be led by Aroden, the Chelish god who died a hundred years ago, and then they were trapped in a magic forcefield and mind-controlled to leave Hell and come back and then the archdevil of the second level of Hell showed up and now weird voices in their heads are reassuring them that the conquering army isn't going to kill them, which it admittedly looks disinclined to do for the moment. 

So pretty panicked.

Aroden gives some orders and his troops and mages back off a little, leaving a corridor clear for the civilians, while the Companions send a quiet message that they should, if they wish, return to their homes. (It'll mean having them out of clear sight, and possibly soldiers will hide with common citizens and plot resistance, but also they should really have the noncombatants out of the streets for this, and they'll probably panic less as a result.) 

Leareth orders some of his mages to raise a couple more concert-Gates back to the garrison in Rahadoum, so he can bring over another five thousand of his troops to occupy the city. 

And he Mindtouches Vanyel. :We just had a close call and it occurs to me that if you had been in sight, the Archdevil ought have gone for you, not me. All of my people have a voluntary compulsion in place to stop taking any actions if under enemy mind-control. Would you and the other Herald-Mages accept this precaution?: 

Oh. Gah. Vanyel thinks about it for several seconds–

:Yes: Yfandes sends for him. 

So Leareth can do that. Meanwhile his Farseers scan the city, looking for pockets of organizing resistance. 

There are a bunch of those; this city had more time than Egorian once they learned the news.