I'm torn on this one. On the one hand I really enjoyed finding out more about the barbarians. Particularly the willow/paper. That makes a lot more sense than the toiletpaperesque images I had before. Maybe if you could work that in earlier it would help the reader (or at least me) see the image more clearly.
The dialogue didn't feel as good in this chapter as in previous ones. It coud just be that it needs some line editing as there were several grammatical errors. But I think the reason it felt off was that this was mostly an action chapter and there was some passive voice. There were also a lot of sentences that were two sentences connected by "and". I think that action scenes are better done in short, concise sentences. Passive voice can sometimes slip by in exposition or lengthy prose, but in action scenes it really shows up.
For example:
"The plummeted towards the ground. Jhuz had a moment to feel a vicious satisfaction, and then they hit the trees. The harpy had quickly regained her senses, and her wings spread out to brace their fall. Then Jhuz saw the medusi, below them both, reach out and touch one of the branches. As the tree began to move, he realized too late what her familiar must be."
I'd probably write it as:
They plummeted towards the ground. Vicious satisfaction filled him. Then they hit the trees. The harpy quickly regained her senses. Her wings snapped out and caught the wind, bracing their fall. Then Jhuz saw the medusi below them reaching out to touch one of the branches. The tree began swaying. Her familiar. Fear bit into his stomach.
The next line you wrote is great. It was oak. Set off by itself, in its own paragraph, it packs a punch, no pun intended. I think this chapter just needs some editing to pare down the prose. It will spice up the action and make the sentences jump out.
Just my opinion of course, ultimately I did like the information we found out. I also liked the fact that we saw the good guys weren't invincible and that the protagonist is still naive. I nearly groaned when he gave the prisoner up. I'm interested to see what's developing just over the horizon, and at this point in the story, that's a good thing.