Thirty-six hours later.
Fang Heng once again saw the game hint appear on his retina.
[Hint: The concentration of Black Fog in the current world had already exceeded: 30%.]
[Hint: The concentration in some areas of the current world had already reached the upper limit of 50%. Players could continue building the Tower of Black Crystal to raise the upper limit of concentration in the area.]
Perhaps because the Land of Ice Soul was especially vast, the spread of Black Fog in this world was extremely slow.
Fang Heng had already constructed twenty Black Fog Pillars of various sizes within the domain.
Each Black Fog Pillar continuously spread out a large amount of Black Fog aura.
Restricted by the slow spread of Black Fog, Fang Heng simply gathered two zombie clone teams to keep digging tunnels beneath the surface, while he built new Black Fog Pillars through underground passages at intervals, trying to spread the Black Fog as quickly as possible.
