While Rosetta was away to attend the magic council meeting she had held to discuss the solution for the necromancy, the others had decided to scout the town and see the situation there. Splitting up into small groups and roaming around out in the open was a foolish move that would make them exposed, becoming easy targets. So they had come up with an idea of using Alden's abilities to navigate through the underground tunnel that he could create by simply snapping his fingers.
Alden had always said that it was an exaggeration and that the tunnels were not created that easily, but they could not be fooled when the proof was right before their eyes. They saw how effortlessly Alden created them. It was as if the earth made way for him. The landscape alternated itself to accommodate Alden's needs.