The discussion these last few pages inspired me, so I'd like to share my two cents: Animusphere magecraft is based on the geocentric model, that meaning, Earth as the center of the Universe. The Animusphere Chant is clearly divided in two parts, I'll call them "ingredients" (Stars, Cosmos, Gods, Animus) and "processes" (Antrum, Unverse, Anima Animusphere).
First: Stars, the shape of the stars. The physical CHALDEAS hardware, to accomodate the simulation of a planet.
Second: Cosmos, the shape of space. What Marisbury needed Daybit for, a model of the observable Universe.
Third: Gods, the shape of god. The soul of the planet, connected to the root (God) or at least a replica of it. What was obtained through the experiments on Seraphix.
Fourth: Animus, the shape of self. An administrator to control the simulation, a brain, an observer, an avatar of this new planet. The Alien Priestess, created from something originally belonging to Olga (might be her soul, might be something else), which eliminated her qualifications as a Master (that's why CHALDEAS can summon the apostles, the Priestess holds the Master qualificatons).
Those are the ingredients. Once everything was ready the was in motion. With Marisbury alive or dead, didn't matter. It had already started. The steps of this recipe were/are:
Antrum - Celestial bodies are hollow: The bleaching of planet CHALDEAS and the subsequent switch of its texture with Earth's. Now Planet Earth is hollow, a cave ready to be filled. This step also involved getting rid of the Olga that fell into CHALDEAS. The presence of two beings being recognized as "system administrator" by the system could thwart the plan. Because while the priestess wanted to bleach that world, Olga wanted to actually manage it, make it better. The priestess then built the fantasy. Using Bluebook and the time tunnel, another "alien from outside" was created. The texture of the bleached planet CHALDEAS was fixed to the Earth, together with this fake "alien" asking for rescue. Hearing the call of its "comrade", Olga was guided to what binds what's from CHALDEAS to Earth, the Fantasy Trees, and through the works of the apostles, a vessel that could contain an "administrator of the planet" was guaranteed. With that obstacle out of the way, the plan could continue.
Unverse - Hollowness is void: Yes, unverse, not unbirth. The fantasy trees hold a galaxy within, but not as an energy source or anything like that. It's there only to look like a galaxy, a galaxy on top of the Earth. The "unversion". The trees, taking energy and growing from both the land and cosmic rays, once recognized by the CHALDEAS system as "galaxies in the surface", would fix the entire texture of the observable universe onto the now hollow Earth, possible because "hollowness" is as the "void", outer space. Because CHALDEAS is modeled as the center of the Universe, observed from the void. With CHALDEAS as the center, the void must surround it. This is the next step the story is currently heading to, and what Daybit was trying to stop by having ORT destroy everything.
Anima, Animusphere - In the void, lies god: God is CHALDEAS. The old Earth is now the void, and CHALDEAS is at the center of it. The geocentric model. The sin all other lifeforms in the Universe would hate humanity for, but that for the Human Order is considered the best outcome. The entire Universe subjugated to Earth. Existing only for the sake of Earth and humanity. Infinite energy. No more pruning. Eternal prosperity. Truly infinite possibilities. A future always guaranteed, guarded by the self of this new world that is the Priestess. The avatar of CHALDEAS, which "earthimilated" the Earth's original texture, born from the lone Animusphere girl. Anima, Animusphere
The soul of the celestial sphere which moves the future.