Death Qi!
Not even twenty years old, Tang Lei and Bu Yao both exhibited an incredibly mysterious Death Qi.
You must understand, ever since Tang Lei and Bu Yao started cultivating with Lv Zhong, they ceased to be ordinary people. The vitality in their bodies was dozens or even hundreds of times stronger than that of normal people. Moreover, they've eaten a lot of pills that contain tremendous vitality.
But now, their bodies are enveloped by Death Qi—quite dense, in fact—and even their lifespan is notably decreasing.
Most people wouldn't be able to detect anything unusual about Tang Lei and Bu Yao. Even Yan Yan and another cultivator, Xiaoyufeì, didn't notice anything.
But Lv Zhong is different. He is a strong cultivator, comparable to an Independent Immortal. His subordinates include the [Soul Devouring Bug] that exclusively feeds on soul energy, and he has absorbed the memories of the ancient powerful being, Lv Yue. Therefore, he could identify the Death Qi with just one look.
