Hythlodaeus nods. Despite his trepidation about the path that might lie before them and his shock from the revelations Hades shared with him, he cannot help but find some measure of genuine joy in the situation.

"Myself as well... Cognitive magic, I was told. Somewhat surprising, but mayhaps not so far off the mark for someone with the Sight. I assume 'tis the same for you?" He smiles impishly as a thought strikes him. "You know, Hades, for all your protests against being treated like a child... It seems as though we are but students once again, starting anew together. Do you remember our days of youth?"

... and the first time Hades must have realized that he was now stuck with Hythlodaeus and his antics.