Li Cheng collected the spoils of war and discovered another disgusting aspect of the Zergs. They did not drop any equipment at all. Killing the Zergs would only result in some useless insect glue and nests.
As for the nest, Li Cheng was familiar with it. As long as this thing was placed on the ground, it would be able to form a nest and produce countless Zerg soldiers.
The Zergs were considered an alien species. They were the opposite of all the factions in the mortal plane. Li Cheng never expected the system would be able to increase the strength of the bug nests to Mythical-grade.
As long as these Mythical-grade nests were placed on the ground, they could produce Mythical-grade Zergs. At the same time, they could produce tens of millions of Zergs in an hour, too.