Jin-Gitaxias emerged as one of the five Phyrexian ordinals before the invasion of Mirrodin's surface. While acknowledging and appreciating Yawgmoth's cunning, vision, and ambition, Jin-Gitaxias feels that Yawgmoth failed because he didn't think things through. To him, compleation is a systemic process with a deliberate end: the creation of a perfect system.
Hunched and barbed, Jin-Gitaxias is covered in the chromelike metals common to Phyrexians of the Progress Engine. Jin-Gitaxias can communicate in a variety of modes and languages, including mental speech, which he uses to drill his ideals of perfection into the minds of others. As part of Jin-Gitaxias's optimized homeostasis, his ribs and spinal pillar flex and pulse disturbingly.
Jin-Gitaxias seeks the perfection of all life through the most perfect of methods: clinical experimentation. Of all the praetors, Jin-Gitaxias is the most concerned with converting the face of the world formerly known as Mirrodin to its Phyrexian ideal, from the smallest organism to the greatest sea. Jin-Gitaxias is a living storehouse of research data, collated from every tidbit of vicious exploration conducted throughout the plane.
Jin-Gitaxias dwells within the now fully Phyrexianized Lumengrid, and has converted the topmost chamber into his own personal laboratory and study. Glistening oil vats filled with special batches of growing newts and germs line the labs. Jin-Gitaxias personally oversees and perfects these labs in his efforts to bring about the ultimate Phyrexian creation: a representation of the philosophies he has presented in his "Great Synthesis."
In an effort to attain the supreme synthesis, Jin-Gitaxias has moved toward the realms of the occult, dipping into both the necromantic and the "divine" in order to achieve the ultimate form and function for his super-strain newts. His behavior is increasingly being noted by members of the Phyrexian sectives, but few are ready to challenge his authority. His lab is stacked with arcane passages from the Phyrexian Scriptures, transcriptions from Sheoldred's necromantic visions. Jin-Gitaxias attempts to produce the creatures from these prophecies and combine them with his vision of perfection.
Jin-Gitaxias has modified the Phyrexian Scriptures in their mentioning of "The Grand Evolution." He sees it as "The Great Synthesis" and has etched his own lengthy treatise about its merits. This came about due to his distaste of the word "evolution," which has been so slobberingly thrown about by Vorinclex and his puppet-queen, Glissa. Jin-Gitaxias views Glissa and Vorinclex as naïve beast-creatures incapable of comprehending basic logic, let alone the true master plan of Phyrexian destiny as written by Gitaxias. He sees the selection of predators through survival of the fittest as a crude, aimless process.
Within the Great Synthesis, Jin-Gitaxias laid out a guideline for the sectives who began work compleating the Mirran population. This scripture is known as the Gitaxian Standard of Purity. Taking ideas from many lengthy discussions with Elesh Norn, the Gitaxian Standard of Purity gives Malcator and Uulbrek the basic rules and measures of compleation.
"It is not a goal, but a process - the process of creating the perfect Phyrexia. Such an endeavor must be undertaken with great seriousness and discipline. Every step must be logged and every experiment transcribed so that we may have an ever-refined map that leads us toward the perfected form. Mistakes are only abhorrent if they go undocumented." -Jin-Gitaxias
"The Great Synthesis is the perfect vision of our goal. The Gitaxian Standard of Purity is our infallible metric."
"It is not a goal, but a process -the process of creating the perfect Phyrexia." (Jin-Gitaxias)
"Forswear the flesh and you will truly see." -Jin-Gitaxias, Core Augur (Culling Dais)
"See how gratefully this world accepts our blessings." -Jin-Gitaxias, Core Augur (Inexorable Tide)
"I despise Vorinclex and his slobberings about 'evolution.' Only I know true progress." -Jin-Gitaxias, Core Augur (Xenograft)
"The fleeting shadows of his primitive self have all but vanished." -Jin-Gitaxias, Core Augur (Distant Memories)
Blessed by the hands of Jin-Gitaxias. (Consecrated Sphinx)
"Dead or alive, my creations are stronger than Jin-Gitaxias's septic minions." -Vorinclex, Voice of Hunger (Noxious Revival)
"A mind may be steeled against madness, but all battlements fall in time." -Jin-Gitaxias, Core Augur (Psychic Miasma)