After arranging everything, Gu Xi did not stay idle.
First, he made a trip to the Underworld Battlefield on Heavy Breath Mountain's side.
This location was close to Maze Demon City, and it was also a place Gu Xi had picked out early on.
At this point, the Swamp Stronghold Gu Xi had set up, along with the battlefield covering roughly a hundred kilometers nearby, had all been placed here.
Only after they were placed did Gu Xi learn that there were all kinds of ways to calculate an Underworld Battlefield.
The Underworld Battlefield over at the Dual King Underworld produced a fixed number of underworld soldiers each day.
It was like a fixed daily refresh of sufficient resources.
Even if they were all killed, the same number of underworld soldiers would still respawn the next day.
But the Underworld Battlefield before him was connected to the Advancement Land where Gu Xi had advanced to Underworld King.
As long as the Shang Three Families attacked, this side would react, and Gu Xi's troops could also fight their way from here to the Shang Continent.
At the same time, the land Gu Xi's troops captured on the Shang Continent would be returned to Heavy Breath Mountain in certain special ways, rather than directly expanding the range of this Underworld Battlefield.
It could be said that this kind of Underworld Battlefield worked in both offense and defense, unlike the Underworld Battlefield in the Dual King Underworld, which focused on defense.
And precisely because of that, every battle on the Underworld Battlefield would cause one problem: how to deal with the extra land.
Gu Xi definitely would not let the Underworld Battlefield expand without limit.
The Swamp Stronghold plus a hundred-kilometer radius was already the limit Gu Xi had set for the Underworld