Before Gremory noticing, Pietro opened the book and started to speak some strange words. Runes and enchantments have a specific intonation, so Gremory thought that was some kind of trick to make him move first.
'This guy must be dumb if he thinks that I will fall into his trap just by saying some random words. At least he should know a little bit more about enchantments before trying this trick.'
But then, he heard the voice of the darkness in his head.
"This book probably is a dictionary, he speaking the language of Nature."
'What?'
Gremory heard about the language of Nature before, but he thought that was just some of the crazy stuff that darkness speaks. But that language was real, yet, he noticed very late.
With shadow evasion, he rushed in his direction swinging his sword, but before reaching it. A mirror appeared and he entered it.