As Merlin explained how her chains work and how they could keep Nina in one place, Claug kept checking Arad's arms. But in the middle, she added something, even her powerful poisons weren't able to put Nina to sleep or numb her hunger.
Green Dragons were also called Poison Dragons. Their poisons and toxins were powerful and versatile. Just how they could make a Demon Lord drunk, they could paralyze, put people to sleep, or outright kill them. They were walking chemical weapons, and Claug was more skilled than most.
Claug lacked the talent for magic, but her body was special. She had grown much larger than her kind, and boasted a higher physical strength and endurance. That powerful body allowed her to generate stronger and more specialized poisons.
Neither Arad nor Aisha could challenge her in making poisons, even if the latter had decades to perfect alchemy. That meant several things for Nina, once her tolerance for poison had been extremely high.