"My spell can open cells, manacles, basically anything. I can also unlock magical locks as well, but only temporarily."

"So we will have to coordinate things so that Zyman's team meets with Rosri's once everyone is inside. We should also work out a signal of some sort in case the teams inside need us to begin our attack early as a distraction. There's nothing I would like better than setting some Gnolls on fire in return for what they did to my home." 

 "Whoever goes in first should take the Krampus bag," Edeleth suggests. "If there is a cell that can't be opened, but has a hole large enough for the bag to be pushed in and withdrawn, a prisoner can simply enter the bag and be pulled out."

"The only spells available to me currently would be simply making a number of us invisible or creating an illusion at the entrance to our tunnel. The latter of which would require me to stay relatively close to it and it would not last very long. Not long enough to rescue Sir Pebbles and return, I am afraid."

Edeleth nodded. "Perhaps, with your skills, it would be better if you went with Rosri to release the prisoners. I can attempt to meditate while the explosives are being carried in, and if successful, I will be able to seal the stone behind us. If not, I suppose I can have more badgers simply fill in the hole.  I wonder if Ruskor's sells fuses..."

"This should help get a prisoner out of a tight space," he adds, handing the Krampus sack to Zyman. "Rosri and Saerirra seem to have ample skills for opening locks. You may find this useful for getting a prisoner through a small gap." (Its a bag of holding)

Zyman gladly accepts the useful tool, and adds; "I propose the following: Once within striking distance, Saerirra will turn as many of us invisible as possible, potentially including Roscoe and I, since my spell is limited to 500 feet. Once reunited with Pebbles, we break him out of his cell, and depending on the circumstances, free as many other prisoners as is practical. The woundd and sick we are waiting for the second team of Edeleth and Rosri to help out with, since the initial strike force needs to move swiftly. Once inside, priority one is gathering weapons and a way to protect the prisoners as we break out, long enough to get them to the tunnel that Edeleth can dig. If Sir Pebbles can be withdrawn with the other prisoners along the tunnel, then we should do that. Otherwise, I'll stay with him, and we form a rearguard for the withdrawal of the prisoners, explosives at the ready. Once all are withdrawn, or if the situation becomes desperate, I can light a short fuse, and then use my magic to safely withdraw via the Shadowfell. No need to leave anyone behind sacrificing themselves."

"If Edeleth is going to stay in the tunnel meditating then I should stay with him. I can create a dome of magic that will be impenetrable to those who were not inside it when it was cast. I can place it a little ways back in the tunnel and as long as you are all there when I cast it you can come and go freely and have a place to retreat to if we need. The only problem with it is that I cannot leave the dome or cast spells from it so if you need my 'artillery' then I will have to let the dome fall in order to help." 

"But...if you withdraw to Shadowfell, where will you return? Not to the point of departure, I hope. It might be under a rockpile."

“A place of refuge is also good, particularly if we need to fighre out something with weakened prisoners. And no Edeleth, I can use the Shadowfell as a shortcut, since it’s something of a parallel to this plane. I will be able to reappear somewhere five hundred feet away from where I started.

"Alright, I shall place it about 50 feet down the tunnel then, close enough to provide refugee but not close enough to block Edeleth's plans for closing off the tunnel. I don't much like sitting things out but I would rather a place of safety is there if needed. I will change Chernobog into something that one of you can easily carry along, that way those of us staying behind can have eyes on your situation and can come to your aid if needed.

The only flaw is that the eight of us will need to be together when I cast the dome. Only those inside the dome when it's cast can reenter it again. So I will have to place it so that it does not block the entire tunnel and we can still get prisoners behind it and down the tunnel as needed. Perhaps some of the Dogs can come with us in the tunnel and provide a plug for that hole if some of the enemy chases the prisoners." 

“I’ll leave that with you. I’m going to be discussing the last details with Roscoe- and telling him that he should best close his eyes when following me through the Shadows, it’s not the nicest place...”

“Now all that is left is to find out the location of the keep.”

"Perfect. I guess we need to get flying and talk to Gaston then." He then pets the bird on the head. "And I guess you get to stay a bird. Lucky you." 

"If Gaston is still at the dwarf army camp, that is where we need to start. Shall we hunt up Grohlak and see whether the Air Force is ready for us yet?"

Zyman readies his gear, and starts to mentally prepare for the tasks at hand. He consciously removes his ring, trying yo find and listen to the voices within.

”Plague, I have honoured my part of the deal, don’t fail me. And I in turn might well be providing you  and the devil barons with evil souls aplenty, the rich bounty of the battles to come. For better or worse, we both profit from this arrangement- so lend me strength in the upcoming battle, and I’ll be providing you with souls to further your station amongst the devils.”

Still wondering how to bring down the entire team of seven, 100 Dwarf Dogs, and five monks, Edeleth decides to speak to the eagles directly.

He finds a quiet place near the Air Force's eyrie to conduct the Speak with Animals ritual. Then he approaches any eagles who seem not to be too busy.

After the standard greetings, he says, "I assume that you are aware by now that we have arranged with your commanders to fly us down to the army camp on the lower slopes for an important mission.  I understand that there are only fifty of you, and there are 112 of us, which would mean two journeys for most of you, and three for twelve others.  I wonder if you might have any wild cousins, or know any giant vultures or other suitable flying creatures in the area who could help carry our forces. We would be willing to arrange for payment. One quarter of a cow for each additional soldier who is carried down. Generous pay for a couple of hours' flying."

The Eagles flap their wings happily at Edeleth, and seem like they fully understand and accept his proposal. One flies away...possibly to get help...

While Edeleth is off talking to the birds Rosri will follow up on a hunch of how to find Gaston. 

He leaves The Hanging Chicken and walks in to an ally. “I need you.” He say to the halfling he knows is keeping an eye out for him. It is only logical that the head of the Thieves guild has unseen bodyguards following him. But he doesn’t need to use logic to figure this out. He has seen and felt his followers since he declared that he is to take up the role as the Head just a few hours ago. 

“I need you to get a message to our contacts in the dwarf encampment. There should be a dwarf named Gaston among them. I need him found and brought to us when we get there. This is of outmost importance and time is of the essence.” He look up on the roof to where he knows the scout is crouching. “And make sure only friends here of this. Gaston is a vital points in our plans. Now go.” Then he walks back to the inn to wait for Edeleth to tell them that it is time to go. 

Edeleth knows he can buy the cows for 10gp each...maybe 5 if they can get a discount. 

He goes to the stable to arrange the matter...the stable ought to be able to  arrange for the purchase of the cows or tell him where else to go, and either handle the payoff details or refer him to a butcher who can take care of the matter.  Payment in advance, of course.  The wood elf embassy is getting smaller by the day.

"Does anyone think we need to purchase anything before we set out? Or do we have everything we need?"