Envy shook his head. "No. I mean yes, I know about dragons, but I doubt they are the same thing as what you're thinking of." He admitted. "I've never seen one, but in books they're described as rough skinned lizards, only ever as long as six feet, depending on species. Like crocodiles and lizards."

He took in the information about her magic, his clouded eyes shifting as he thought it over. It would explain why she was able to disappear for long periods and return here with armfuls of supplies. Much more adept than Ysaryn and Zeke. He earmarked his request about that for a later moment. 
"A world traveler." Envy said in awe. "I never thought they'd exist. Or that I'd meet one. Or that one would be responsible for the destruction of my city. Frankly, I always thought it would be my bloodkin." He added bitterly. "The more I hear about this man, the more I want to hurt him, myself, which is not like me." 

Entrusted. "So, you're not born with this power, like myself and Ruli? You were given to it?" He paused, thinking. "...Because of your dragon-blood?" He pictured for a moment lizard-bred people with forked tongues, and suddenly very much wished he could ask to see Kire's. "Ysaryn, she can do what we've come to call Shadow-Walking only because she had the genetic disposition to do so. She traveled to Ziad on foot with Bolym and a few others, and when she managed to get [i]here[/i], I was able to help her learn. I imagine this dragon-blood is treated much the same?"
His eyes went wide and he raised his head slightly. "Can [i]dragons[/i] travel between worlds like this?" He wondered, suddenly both thrilled and terrified by the idea. 

"Regardless," Envy shook his head and waved a hand. "I have a request of you that may make you uncomfortable. I know you've done plenty already, but." Envy inhaled. "Ysaryn goes to her home-city for supplies. However, they are incredibly racist towards elves there. Well, in Ziad, as well, but that isn't the point. So, she takes Zeke, because he is able to guarantee her safety. But, due to his injuries, he cannot carry much, and she cannot carry much because of her magic's strength. If you wouldn't mind, I would have Ruli accompany her one day to learn how to get there, and then if the two of you, you and Ruli I mean, wouldn't go to to give the duo a break. Their, erm, cover story infuriates Ysaryn, and I really do worry she'll kill him one day. You saw her reaction when I asked her to go." It went without saying that he didn't want to lose anymore people.
The plus side, getting Ruli away from Zeke, and away from the cavern might help his mood improve.