After getting the explanation from Water Master Xuanwu, I noticed some issues that I hadn't before, and also received some answers that I had been unable to obtain in the past.
Looking back now, it's indeed strange that Xu Gou possesses power nearly equivalent to the White Tiger Killing Power. In the past, I thought that Ying Lingyun, as half a member of the Zhu family, should have had the opportunity to come into contact with the Yama Sword, so it seemed plausible that he could transform Xu Gou with such Gold Element Power, but in reality, this seemed quite far-fetched.
