Orleans part 2 unusual strength

We followed the soldiers to what at the first glance looked like an intact fort but the inside was a completely different story. I looked around and saw only wounded soldiers with some having injury's from weapons to claws to fire. We then began to ask around and found out that King Charles was killed and that Jeanne d'Arc was the one that killed him,his sons and violated his wife and daughters in public view. As the soldier continued to explain I got slightly hard imagining it. Then we got attacked first by skeletons and then we got attacked by Wyverns.

Then a blond haired woman shouted at the soldiers to douse themselves in water as the soldiers looked at her with confusion. As I snapped a wyvern's head clean off I knew for a fact that I shouldn't have be able to do that but regardless I put that out of my mind as I killed several wyverns making sure to take the scales,bones and teeth for later. After we killed all the wyverns the soldiers ran and screamed that the dragon witch is here. With the chance that she might have more information we started to ask her questions but she interrupted by saying it's better to go to the forest. And so we followed her to the nearest forest all the while I was wondering how I was able to snap a wyvern's head clean off.