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"Jor-El! By the authority of General Zod, surrender the codex."
Sword of Rao soldier[src]

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.[1]

It held the genetic attributes of all artificially incubated infants before their inception, and is currently hosted within the body of Kal-El, the last known survivor of Krypton.


The codex once belonged to an ancient Kryptonian with whom modern Kryptonians shared an identical genetic makeup. Kryptonian society developed the technology to read and later implement the genetic sequences of the remains to fetus models so as to establish artificial population control, thus producing citizens fit for a predetermined role in Kryptonian society upon birth.

Kryptonian Expansion[]

With a massive terraforming project underway to spread their influence throughout the galaxy, Genesis Chambers were created for Kryptonian scout ships so they could carry embryos to new worlds for colonial repopulation.

Battle of Krypton[]

Prior to Krypton's destruction, Dru-Zod organized a radical coup d'état to overthrow the Kryptonian Law Council with the paramilitary faction known as the Sword of Rao, with the intention of bringing order to their failing society. Zod attempted to seize Krypton's main growth codex with the intention of purging any bloodline deemed weak in hopes that the movement would cause a restorative effect to the race and their dying planet.

However, Jor-El, Zod's life-long friend, immediately opposed this ideology and, after escaping arrest, stole the codex in order to bond the genetic information within to his newborn son's cells to be sent off to a distant planet so as to preserve Krypton's legacy. Zod's revolution was quickly ended and he, along with all of his radicals, were sentenced to three hundred cycles of Somatic Reconditioning within the Phantom Zone for crimes against the state and the murder of several government officials including Jor-El and High Eminence Ro-Zar.

Destruction of Krypton[]

After Krypton's destruction, the Sword of Rao members were liberated from the Phantom Zone due to the surge of energy released. Tirelessly, they journeyed through space in search of survivors before receiving a distress signal from an ancient scout ship located on Earth, inadvertently activated by Kal-El during his reunion with his father's consciousness.

Alternate timelines[]

Flashpoint Timeline[]

In Flashpoint, just like in the main universe, the codex was stolen by Jor-El. Unlike in the main timeline, Jor-EL implanted the codex into his niece, Kara Zor-El, though she believed Kal-El held the codex. When Kal-El was sent to Earth, the pod that carried him was intercepted by General Zod, who attempted to extract the codex from the infant Kal-El, killing him in the process. When Zod invaded Earth, he slew Kara and extracted the codex from her.[2]