Zombie Apocalypse: Infinite Fusion

The world was suddenly plagued by a zombie outbreak, and human civilization fell in one night.
Lives were lost to the moving corpse, and those who survived lost their homes.
A few years had passed since the outbreak, and humans had adapted to the apocalyptic world by building shelters of different sizes.
Ebert was the son of the chief of a shelter.
He thought that a life of luxury with dozens of women serving him awaited him, but his father had died on a mission scavenging for resources.
With the most powerful and experienced person gone, the shelter was on the brink of collapsing.
It was then Ebert realized he had a special power, the Unlimited Fusion.
[1x Iron]+[1x Iron]=[Stainless Steel]
[10x Cotton Shirt]+[10x Cotton Shirt]=[Battlesuit]
[Handgun]+[Supersized Battery]=[Magnetic Assault Rifle]
[Magnetic Assault Rifle]+[Cannon]=[Magnetic Railgun]
Through countless research on his power, Ebert learned that he could even fuse zombies together.
[Female Zombie]+[Female Zombie]=???
From that day onward, Ebert became the leader of the shelter that got stronger by the day…