"Apology accepted, I can understand the concern. They sound a bit like what my brand of Mages would call "Left-Handed" actually, magic users who delve into forces of great uncontrollable danger just for the sake of getting a bit stronger more quickly... Or eternal life, now and then."
As the girl vanishes, he glances down at the book for a moment... Something's shifting there, and his eyes light up as code dances before him. To be exact, from his viewpoint the flow of mana would take the shape of ever-shifting lines of code which twist into the desired string for the magic being worked. At this point, Prometheus can, in fact, hear the whispers. So the book is their leader? Eh, he'll leave it be.
"Ya know, if you don't want to do this I'm not forcing you. I'm a pretty laid-back guy like that after all, I'd be happy to just talk magical theory instead of dueling if that's more your speed... Though, I do find the direct method of exposure is often the fastest path to gaining new knowledge."
The Mage walks a bit further back, wandering over to one of the place's rings with a slight smirk on his face as he begins to tap away at his phone.
"Now, you wanna see some of what the Awakened can do or not?"