Concepts.
The abstracts responsible for all fundamental phenomena across the Cosmos.
The Concepts governing the Multiverse Jamie lived in, however, were innately chaotic by nature.
In other words, they were volatile, unstable, and if left unchecked, they would dye the Multiverse in their colour—chaos.
Because of this, they had to be kept under control. They had to be maintained, to prevent these inherently volatile abstracts from unleashing catastrophic disorder throughout the Multiverse and beyond.
The ones who managed and maintained the Major Concepts were a group of 12 individuals known as the Eternals.
Each of them was an immensely old existence of the Ultimate Realm, wielding a level of power that nothing beneath their Realm could ever hope to match.
It was this insurmountable gulf between the Zenith Haven and Ultimate realms that made Jamie's decision to challenge an Eternal appear to the rest of the Cosmos as nothing short of madness.