As a matter of fact, Zhao Hai didn't expect Edison to use such a method. Edison had captured all the undead creatures in the cities he conquered and brought them into his Origin space. This allowed the number of undead creatures in Zhao Hai's Origin space to increase by several times within a month. In other words, the number of undead creatures in Zhao Hai's Origin space had reached a shocking number of billions.
Of course, not all of the billions of undead creatures were in the boundless space. Most of them were still in the underworld, but they had already pledged their loyalty to Zhao Hai. With the addition of these undead creatures, the cities that Edison had conquered could be said to be impregnable.
If other undead creatures arrived at these cities at this time, they would discover a very strange phenomenon. The undead creatures in this city didn't trade like in other cities. Instead, these cities were more like machines that were running at full power.