[ There's a nod there as she takes another drink. Good. Sanzang understands the importance of the map. ]

The mask itself is what allows the Sorcerer to control the ayakashi. Using it on an ayakashi gives him the ability to name them as one would name a shinki.

[ A visible look of disgust comes to her face. ]

I can't say if the two incidences are connected. But this Sorcerer... I have a personal score to settle with him.