Ye Zhen's gaze was fixed intently on the high-grade thunder attribute spirit stones that emitted a ghostly light in the deepest part of Kui Niu Cave!
Compared to the five attribute spirit stones, thunder attribute spirit stones are even rarer and more valuable!
Usually, an ordinary low grade thunder attribute spirit stone is priced similarly to a low grade thought spirit pill.
But a mid-grade thunder attribute spirit stone, when it appears, becomes a highly contested treasure at auctions.
Yet here, the thunder attribute spirit stones densely packed are all high-grade spirit stones, and the number is at least over ten thousand. Furthermore, within Ye Zhen's divine sense, a few are the exceedingly rare supreme thunder attribute spirit stones.
However, more precious than these is the spot where Kui Niu's saliva dripped as it slept.
