"If they didn't want it used against them, they shouldn't have done it."

"I am not sure I agree with that logic, but noted."

"Scott?"

"I don't like blackmail, but...if we can get people to stop hurting each other, it's worth it."

"We need to get rid of the alpha, and the hunters aren't helping, they just want to kill Scott."

"We can keep the blackmail as a last resource. They might reevaluate their priorities with better incentives."

"They might. Anything else before we storm the castle?"

"Is there anything Stiles and I can actually do to help? I want to help."

"You can help us search the Argent stuff and then there is the whole being a bait business."

"I didn't forget the bait thing. Okay, so let's search."

Felix contributes to the research... by sleeping and copying objects to be researched.

Now they have a copy of the Argent house somewhere in the dimension. Do they want to come and see?

Scott and Stiles are quite willing to help.

Good, so is everyone else.

What do they find that might be relevant?

There are a few lists of cities with no clear uniting factor, a few documents that seem to describe current events such as marriages and deaths of particular families, and a USB drive.

They write everything down for later research. Anything interesting in the USB drive?

A bestiary, apparently. 

So many creatures, so little time.

Well, they will check the parts about werewolves, but otherwise leave the research for later.

Scott is experiencing some sort of emotion. He seeks out his anchor.

Hug.

Hug. "Are you okay?"

"I hadn't really thought about it. The Argents, what they do. Hunting people like me." 

Squeeze hug. "It can't be easy to think about it."

Stiles gets to reading about werewolves.

"Anything good? Come on Fenris, don't let me down." 

"I didn't want this. He attacked me in the woods, at night. Stiles thought it was cool, and it was, it is, but it's not something I asked for."

Well, Kato can't squeeze harder, so instead he says. "We will make everything better. That is what we are here for."

Fenris is just checking the last name. Then he turns to Stiles. "Every single one of the victims shows up among the Argents' documentations in one way or another, strongly hinting the Argents knew them."