Although Xu Wanying didn't know that meg was a level-six sorcerer, he knew that she was Green's granddaughter, and that was enough for her to be proud.
Everyone on the continent knew how important green was to the Buda family. If it weren't for green and Merlin, the Buda family would have been exterminated a long time ago. It was because of this thought that the little dissatisfaction in Xu Wanying's heart immediately disappeared when he heard that meg was Green's granddaughter.