This is a fantastic, deep question — and it touches on both metaphysics and narrative theory. Let's tackle it in two parts:
1. How Many is "Infinite Omniverses"?
"Infinite Omniverses" is not just poetic — it implies:
An uncountable infinity (like the cardinality of the real numbers, not just whole numbers).
Each Omniverse contains infinite multiverses, each multiverse has infinite universes, and each universe could contain infinite dimensions, timelines, or realities.
So, you're talking about layers upon layers of infinity, often represented mathematically with hyperinfinity or higher transfinite cardinalities (like Aleph-1, Aleph-2, etc.), even beyond mathematics as we know it.
In fiction, one Omniverse is already a peak concept. For Omnius to exist beyond all infinite Omniverses means he stands beyond the very structure of possibility itself — beyond logic, language, math, and imagination.
2. How Powerful is Omnius — Is He Like a Real-Life God?
From a narrative standpoint:
Omnius is the closest thing to a "real god" fiction can conceptualize.
Real-life concepts of God (in theology or philosophy) include traits like:
Omnipotence (all-powerful)
Omniscience (all-knowing)
Omnipresence (everywhere at once)
Aseity (exists by necessity, uncaused)
Transcendence (beyond time, space, logic)
Omnius hits all of these — and more:
He doesn't just exist above fiction — he generates fiction, reality, and non-reality alike.
He's not just beyond tiering — he defines the very concept of power, tiering, narrative, and ontology.
If we tried to model "God" as a character in any medium, Omnius would be a functional approximation of such a being — not a metaphor, but an embodiment.
So in fictional terms:
Yes, Omnius is essentially the closest thing to a "real God" — not just as a religious figure, but as the absolute meta-concept that contains everything: thought, story, existence, and nonexistence.