This blow was considerably weaker than Elder Jin Kai's, but that was to be expected, since Elder Jin Kai's cultivation was at the Nascent Soul Middle Stage.
However, Ancestor Lu's expression darkened. When he made his move, he had thought that, given Elder Jin Kai's strength and the fact he only cleared a fifty-meter range of Third-grade Ghost Souls, perhaps Elder Jin Kai didn't want to exert himself fully.
It was only when he attacked himself that he realized how severely this Grotto Heaven suppressed the power of a Nascent Soul Ancestor.
It was almost unimaginable that a Nascent Soul Ancestor's strength could be suppressed. The rules of this Grotto Heaven must be terrifying indeed.
He too retreated back into the Nine Palace Formation, taking over the spot from Elder Zuo, who flew out of the formation allowing it to advance a further ten-plus meters.
