Hollow Earth brought the Mineral Heart Demon Sandflies and Firefly Demon Fetuses he had collected to Lin Yuan.
In all honesty, Hollow Earth was rather unhappy about the current circumstances and wanted to change his status in the subterranean world.
He had already reached the Afterlife Realm and could be considered the strongest subterranean Dictator.
The only other candidate who stood a chance against him was Rock Underworld. Both of them had received the Earth's Sacred Fruit.
Mountain Furrow, who had not received the Earth's Sacred Fruit, was less powerful than them.
If not for the fact that the two of them were certain that Lin Yuan would not be increasing Mountain Furrow's power, they would be doing all they could to keep him down.
Being a Land Imp, Hollow Earth was much cleverer than Mountain Furrow and Rock Underworld.