"Hm."

He leads them inside.

The smell is chemical, sterile, but there's also the metallic tinge that, given the context, can only come from blood. 

The rooms of the warehouse are dedicated to operating tables, surgical equipment, and...well, it's probably a good idea to ignore the humanoid creature suspended in a chamber full of fluid, isn't it?

"The formula is in here somewhere...they were preparing it for injection, and the hellhound was bringing the corpses to the Nemeton anyway, so we figured we could just do it there." 

She's giving this supposed resurrection formula fairly good odds of turning out to create some sort of hellish monstrosity rather than bringing anyone back to life.

"Do you know the contents or method of creation for this formula?"

"It's his blood. The immortal Nazi werewolf in the tank. They managed to live off it for decades longer than they should have. If you don't want to risk it on anyone you like, that's fine by me."

"If it does work-"

"We still have him. We can keep extracting more. You can't tell me you don't want the betas you lost back? The people killed by Hale's revenge spiral? Stiles' mom?"

"All as members of a pack with you as their alpha, I presume?"

"Not the humans. They're free to do what they want. And I'd be a lot better at it than their last alpha."

"'Immortal Nazi werewolf' sounds far too much like the villain in a pulpy horror novel for me to put much faith in this plan."

"You can pick the first test subject, then, and decapitate them if it goes badly."

"Fine."

"It should be someone human, then, not one of the chimeras. How about...we need a body?"

"Recently dead bodies, maybe. I don't know if it fixes decay."

"I'm not sure we have any recently dead humans."

"...will merely well-preserved corpses do the trick?"

He grins, having found the kit. 

"Okay, who's the lucky guinea pig?"

"It's possible we should try someone less...potentially sensitive, if things go poorly, but I do have the body." 

"The Doctor? That is predictably going to end horribly."

"No. I have him preserved, and there's no doubt about his humanity. Derek's father."

"Very well."

"I have what we need now. Let's go."

"Alright. Back to the clinic, then."

"His body is at the clinic?"