Lind had to console Fey for a long while after they left East End. He had learned much and had a much better foundation for weaving than his stumbling around a decade ago. He had learned from a little over ⅔ of the village.
While it had been informative, he also was always looking at the further solidifying silvery ring in his Sky Core. His was much fainter than any of the teachers in the village but was similar to some World Realms that were nearly at grade 3 of weaving.
So Fey had not caused him much loss, but he was stunned to learn how serious heart demons were in higher cultivation realms. The loss of protection on the mind made perfect sense as the body was heavily ravaged as well as the dantian and meridians.
The mind would be just as damaged. Lind made a note to talk to Qing about it later. She might actually know all about it and Fey might need more help than Lind could give.