Eiro silently flew through the narrowing mineshaft, taking in the information that his duplicate had just learned. If Nelly was the first Naiad... her and Eiro had to have a conversation about that once she was better again. Since the Naiad Queen had healed her physical body, Nelly only needed to have the mental strength in order to wake up now, and Eiro knew for sure that she had that strength in her. But, for the time being, since he had the confidence that Nelly would be okay now, Eiro could properly concentrated on what was going on directly around him in the central material plane.
To calm them down as well, Eiro let the others know that Nelly was going to be alright. Of course, particularly Sarius and Gondos were now able to relax considerably as they did their part of Eiro's plan. That being the case, the party finally reached their destination. It was a specific section of that massive demonology sigil, at the center of which the Devil was hidden away.