Thousands of years before the age of Fabland, the world existed as a single realm known as Primora. Within Primora flowed the pure energies of all seven elements in perfect harmony. However, a conflict between Light and Shadow disrupted this balance and shattered Primora forever.

From the fragments of Primora emerged five elemental realms. Terra Prime rose from the living earth, Aero Zenith formed among the endless skies, Aqua Realm flourished beneath vast oceans, Inferno Core awakened within volcanic lands, and Chrono Nexus emerged as a realm devoted to knowledge and cosmic understanding.

Yet not all of Primora was lost. At the center of the fracture remained a stable convergence point where the energies of the realms continued to intersect. This place became known as Nexus Prime, the Heart of the Realm Worlds. Following the fracture, the Light Guardian chose not to establish a civilization of its own. Having witnessed the destruction caused by imbalance, Light embraced neutrality and guided the development of Nexus Prime as a place where all realms could coexist. The Shadow Guardian, however, pursued a different path, withdrawing from civilization and seeking forbidden knowledge beyond the known worlds.

As centuries passed, great civilizations arose across the five realms. The Terrakai Clan transformed Terra Prime into a world of magnificent crystal cities and architectural wonders. The Sky Clans of Aero Zenith mastered exploration and navigation among floating islands. The Tideborn of Aqua Realm developed cultures devoted to harmony, healing, and wildlife preservation. The Forge Clans of Inferno Core became pioneers of engineering and invention. The Keepers of Chrono Nexus dedicated themselves to preserving knowledge and understanding the mysteries of existence.

Though separated by geography and elemental identity, these civilizations remained deeply connected through Nexus Prime. Portal networks linked every realm to the city. Scholars traveled to its academies. Merchants exchanged goods in its marketplaces. Explorers launched expeditions from its gates. Diplomats gathered within its halls to ensure peace among the realms.

During this golden age, the Realm Worlds experienced unprecedented prosperity. Great academies educated future leaders. Primeval Sanctuaries protected ancient beasts. Elemental Familiars lived alongside civilization. Technological breakthroughs transformed daily life. Knowledge flowed freely between realms, allowing innovation and culture to flourish.

The achievements of this era would eventually give rise to many of the wonders remembered throughout history, including Elementrix technologies, Morph Vehicles, Exosuits, Armor Beasts, Spirit preservation systems, and the foundations of the Realm Explorers.

Although the Great Fracture's legacy would one day lead to even greater challenges, the civilizations of the Realm Worlds proved that cooperation could accomplish what no single realm could achieve alone.

Their cities may have fallen.

Their people may have vanished.

But their legacy continues to shape the world long after their age has passed.