The demon laughs, and in Mello's voice, coming out of Mello's throat, it sounds entire discordant and wrong. "Don't you like it? I learned a new trick." He tosses his hair over his shoulder, slowly dragging two ungloved fingers down the left side of his face. "I could show you, if you want. Teach you something new, for a change."

Of course, that something would involve ceding power to the demon. Not so much something to be taught as something given, something the demon could take.