#atraxa

Principles of Asexual Heredity in the Phyrexian Organism

We know these things for sure about Phyrexian reproductive biology:

Phyrexians reproduce asexually; it is well known that one drop of oil, from one individual, is enough to birth a population of offspring (such as all of New Phyrexia) or convert a non-Phyrexian organism.

Phyrexians natively born of the oil ("core-born") inherit mnemonic and phenotypic (appearance) information from the oil that created them. For example, core-born Phyrexians of the Orthodoxy naturally develop porcelain metal; it is an inherited, lineage-specific trait. The oil also carries ancestral knowledge such as the Phyrexian language and echoes of history.

The five suns of Mirrodin somehow caused the originally mono-black lineage of Phyrexian oil to splinter into five colored lineages. They may have all arisen from one drop of oil, but they are phenotypically diverse.

(Little canon data is given about the genealogies of core-born newts, but it would most logically follow that Phyrexians descend from single-parent lines, a family tree with continually forking branches and no unions of mating as with sexually reproducing organisms.)

The mechanism I propose for the diversification of Phyrexians on Mirrodin is mana-induced mutagenesis. As a deeply magical material, it follows that Phyrexian oil is prone to being influenced by concentrated sources of mana, such as the suns of Mirrodin (which were trapped in the core, in close proximity to the progenitor oil, during the birth of New Phyrexia). Exposure to mana can thus cause de novo mutation in glistening oil that manifests as novel phenotypic traits in resulting Phyrexians. These mutations are not random, guiding phenotypes to align with the color causing the mutation.

Then there is the issue of inheritance via phyresis, or compleating another organism which was not originally Phyrexian by introducing Phyrexian genetic material into its body. To keep it simple I will begin with mono-color infections: an organism is infected with oil from a Phyrexian whose lineage traits (i.e. white-aligned Orthodoxy lineage, porcelain) may not match their own color identity.

Hypothesis: Phenotype (what color/type of Phyrexian an infected individual becomes) is determined solely by the color of infection, not the subject's own colors. Crucially this isn't the same as color identity; i.e. one can be a porcelain Phyrexian and still have a Boros identity by gaining red-aligned values or retaining them from a pre-compleation life, even though their phenotype is white only. (Much like how elves are associated with green mana, but Simic-identity elves exist.) This phenotype color, in turn, is also what would be passed down to any newts the turned individual creates, or subjects they themselves infect.

MOM corroborates this hypothesis. A mono-black-aligned human, upon exposure to Progress Engine oil, becomes a Phyrexian with a pure blue-aligned phenotype. The changes to their color identity are additive--they retain black alignment--but their phenotype is blue only. All the transforming creatures of MOM follow this pattern.

However, Planeswalkers in ONE did not. For example, Jace was infected by Vraska, who had both black color identity and a black/Thanes-aligned phenotype, but spontaneously developed eyestalks and other traits characteristic of blue Phyrexians from the Progress Engine.

New hypothesis: Individuals with a strong enough internal concentration of mana, i.e. Planeswalkers, cause oil to mutate in vivo to align with their own color, much like how the suns mutated oil in Mirrodin's core. This further shows that mana-induced mutagenesis is color-specific. This should however create a new blue lineage, independent of the Progress Engine, also spawned of blue mana but not necessarily identical. I do not have an explanation for Jace's resemblance to the Progress Engine besides convergent "evolution."

Proposed further study (not ethics-approved): Infect a colorless Planeswalker, i.e. Ugin, with colored oil to test whether a null color identity still has mutagenic effects.

To complicate this, though, we also have examples of Phyrexians who are chimeras of multiple colors, combining traits of different lineages. Vishgraz was assembled with material (genetic and otherwise) from a white, a green, and a black Phyrexian. It makes sense that Phyrexians put together in this patchwork way could have a combination phenotype. Atraxa was not assembled from scratch, but infected with four separate colors at once. Maybe there are just four types of oil circulating in her body?

I am, of course, interested in inheritance. If these Phyrexians show combined phenotypes, what colored trait(s) do they actually pass down? Do they have individual "cells" that are still only white, only green, only black, etc., or did the colors somehow combine on the most basic hereditary unit level? Thankfully, we actually do have an example of a "chimera" Phyrexian asexually producing core-born offspring: Ixhel.

Ixhel shares multiple colors with Atraxa, not only in her color identity but also apparent phenotype (she has both Orthodoxy porcelain and Swarm copper). Two possibilities here: 1) She truly inherited both genetically; Atraxa passes down multiple colors when she reproduces. 2) Her "core" physiology is still rooted in one color, i.e. white porcelain, and the green parts were added after the fact. I don't have an answer for this, but it's intriguing to consider.

Proposed further study: Attempt to isolate the smallest "unit" of Phyrexian heredity (one single nanobot of the oil) and test if it can only store information about one color, or multiple. See if a germ is formed from only one of these units, as with eukaryotic zygotes, or from multiple.

Surprise! It's chapter 14 of Steel and Oil! Where Atraxa is very normal and no freak shit happens. This chapter marks the three year anniversary of me starting Steel and Oil! I challenged myself to write this in time for that, which was p fun! Read and leave a comment if u enjoyed! 

Atraxa, Praetor's Voice- ballpoint pen sketch