Grey naturally knew the plans of the trio, but he felt they should get the picture since he had already made it clear to them that other than the mission, he wasn't going to involve himself in anything else. As long as whatever they had plans of doing was not in line with the mission he had in mind, then he was not interested.
It didn't take long to track the place the treasure was going to be born, all they had to do was to go to the area with a higher concentration of Magical Beasts and they would be able to get the general knowledge of the place.
A few days passed while they were waiting for the treasure to be born before the Three Headed Deer appeared. The one that showed its face was shockingly in Rank Eight.