After synthesizing ten thousand zombies, Ye Li didn't continue synthesizing more. He ordered the remaining nearly 4,000 zombies to attack the massive horde of zombies.
Currently, less than 4,000 zombies remained from the initial ten thousand. For the current Ye Li, this number seemed pitiful.
Fortunately, there were still many zombies on the ground that hadn't died yet. Ye Li could determine which zombies had been defeated by his Apocalypse Legion.
After opening the synthesis grid in his mind, Ye Li synthesized the zombies that the Apocalypse Legion had defeated.
In the end, he synthesized a total of over 8,000 zombies with a roughly equal number of males and females.
After synthesizing these 8,000 zombies, he synthesized a tier-four male zombie and a tier-four female zombie.
In his system space, he already had a tier-four male zombie and a tier-four female zombie, so he continued the synthesis.