What is the growth Codex?

The Growth Codex or Registry of Citizens Codex, is an ancient kryptonian artifact that decodes the genetic makeup of the artificially incubated babies on the planet. It translates a child's genetic attributes before his or her birth. Zod was born to be a soldier, as dictated by the Codex.

What is the codex & how does it work?

The Codex is a database. The database contains all the genetic information of all the bloodlines of Krypton, as represented by a billion individuals (governed by strict population control).

What is a Kryptonian growth Codex?

" Jor-El! By the authority of General Zod, surrender the codex." The Kryptonian Growth Codex, simply the Codex, was the remains of an ancient Kryptonian that contained the potential genetic information for Kryptonians to be used in conjunction with Kryptonian genesis chambers.

What is the codex & how does he kill Zod?

The Codex is an ancient Kryptonian artifact that defines the genetic makeup of the artificially incubated babies on the planet. I will elaborate on this: he holds back for most of the movie, he never had to push himself at all, ever. Once he beat the World Engine, he came back and proceeded to mush Zod and then kill him.