If what Yu Shan said was true, and he really was crippled by Lin Yi, then the Hidden House Yu had to take revenge!
"That Lin Yi is very strong!" In order to highlight Lin Yi's strength, Yu Shan didn't hide anything from Zhang naipao. He told the elder about Lin Yi's recovery and breakthrough.
"That magical? You can recover your strength even if you've lost it?" This was the first time the elder started to pay attention to Lin Yi. It wasn't because of the practitioner's Arts-it was powerful, but he knew that no matter how strong the practitioner's Arts were, they had to be compatible with the practitioner's body. Without the body, you wouldn't be able to learn it, and if you forced yourself to learn it, you'd go crazy and die!
So he wasn't interested in stealing other people's Arts. House Yu still had a few powerful Arts, but they required special physiques. House Yu's people didn't fit the requirements and couldn't practice them at all!