God-level zombie synthesis system of the end of the world

Travel through the apocalypse and obtain a super synthesis system.Two level 1 zombies can synthesize level 2 zombies, and the combined zombies are [-]% loyal.The higher the level of the zombie, the higher the appearance.
Zombies have exclusive skills, such as the Heaven-shattering Fist, and the three ghost swords that kill people in a row.Zombies will also produce zombie treasure chests every day, and good treasures can be opened in them.
After Ye Li had a super synthesis system, he began to frantically synthesize zombies in the last days.With the system in hand, I have...