When you gaze into the abyss, the abyss gazes back at you.
This principle held true even in the Primordial Civilization billions of years ago.
To gather an astronomical amount of information from the Initial Chaos Planet, Zero had installed an extraordinarily advanced ultra-long-distance information transmission system in artificial orbit around the planet, one capable of spanning four-dimensional space.
Using this system, You effortlessly pinpointed the Primordial Civilization's homeworld of origin, even locating the site of Zero's largest physical computing hub in the three-dimensional universe.
When Zero devoted most of its computing power to the Chaos Planets, slaughtering the primitive life there.
"You," true to its name, was like a shadowless, formless, elusive ghost. Crossing seas of stars, it scattered the seeds of chaos upon the Primordial Civilization's homeworld of origin and among the populous Bountiful Stars.
For a time, chaos spread wantonly through the harmonious, orderly body of the Primordial Civilization like a plague.
Countless gentle, kind animals and plants, secure in their ecological niches, underwent the most grotesque mutations, becoming mad, violent, cruel, and bloodthirsty.
On one hand, they slaughtered one another, letting the fittest survive and evolving without limit, seeking to replicate the forms of the Doomsday Beasts on the Initial Chaos Planet that were best suited to carrying out missions of death.
On the other, they formed overwhelming tidal swarms and launched attacks against the individuals of the Primordial Civilization and the magnificent cities they inhabited.
Even more terrifyingly, some—on certain planets, even most—individuals of the Primordial Civilization were corroded by "You."
From deep within their minds, once so law-abiding and orderly, an incomparably evil voice suddenly arose.
The voice tempted them, saying that they had always been Zero's puppets, chess pieces unable to control their own fates, soulless components, walking corpses without selves or creativity.