He had frequented the Earthen Furnace enough now that he knew where most of the dangers could come from, so even though he did not take his Giant Moth buddy here the first time, he did afterwards. It made him feel alot better to have his buddy with him, He felt like he could trust it and be himself with it. Even though it never talked back specifically, but Silas felt like it understood him nonetheless. Even if all it did was flutter in place or move away from him to make things clear. 

Once again he was lost and asked His Moth Friend to fly ahead and see if the path he wanted to take was safe enough. He waited a while and got worried, but everything was fine as not much later the Giant moth came fluttering back to him. it made no indication to not go that way, which he took as affirmation that the path was safe enough. 

As it fluttered back, he smiled at the sight of it. Man he was happy to see it come back to him safely every time again. It slowly has become one of his best friends. At this point, he couldn't even imagine adventuring without it.