Regenerative skill was the skill that they all felt stress over. Ella made it clear that this was also the one skill that they all had to absolutely worry about. "Otherwise, they are very powerful. They can use strength beyond what they look like. This is all because of that skill."
Ralph adding to it made it seem that he had considered this beast as well. "There was once one outside the city. Some guards apparently used to throw the street kids they found outside the wall for it to eat. I don't know if that's true, but we all got taunted with it."
"And those guards are gone now." Grace huffed at this. She was not at all happy to learn a little about how Ralph knew about the troll species of beasts. Especially with the fact that he had noticed why everyone was curious that he knew it, and how he just openly said it.
Your gift is the motivation for my creation. Give me more motivation!