The entire Yan Family is dead, including the old master entrusted by Tang Rao to protect their territory; they were all killed together.
Tang Rao should have anticipated this earlier; given how many enemies the Yan Family has made over the years, when he gave such an important task to the old master, he should have realized it might not proceed smoothly.
Fortunately, despite the old master's death, the land is still his. As long as his things remain, what difference does it make whether unrelated people live or die?
"So you mean everyone in the Yan Family is dead except for the Eldest Son?"
Thus, Tu Lingfeng's poisoning cannot be unrelated to the Eldest Son, who perhaps planned to teach Tang Rao a lesson through Tu Lingfeng's affair, before launching larger revenge on those around Tang Rao?
Thankfully, Tang Xiaobai, the oracle, was around, or Tang Rao wouldn't think the culprit was the Eldest Son.
