Apocalypse: God-level Zombie Synthesis System

Ye Li was transmigrated into a zombie world and acquired a zombie synthesis system.
Two level 1 zombies can be synthesized into a level 2 zombie, and the synthesized zombie is 100% loyal to its creator.
The higher the level of the zombie, the more attractive its appearance.
Zombies possess exclusive skills such as the Earth-Shattering Fist and the Deadly Triple Ghost Sword.
Zombies also produce zombie treasure chests every day, which contain valuable items.
After obtaining the super synthesis system, Ye Li began crazily synthesizing zombies in this world. With the system in hand, I reign supreme!
Zombies, tremble in awe! I, Ye Li, have descended!