The Omniscient Rune crystallized in the moment when the legendary Wielder known as the First Sage achieved perfect comprehension of all ten magical schools simultaneously, their consciousness expanding across every realm just as the Arcane Fracture reached its peak instability. Their transcendent understanding became permanently inscribed into reality itself, creating this eternal repository of cross-realm wisdom.

This luminous crystalline tablet constantly shifts between the runic scripts of all ten realms, its surface flowing with ever-changing inscriptions that pulse with synchronized light reflecting each realm's signature colors. The rune hovers perpetually above any surface it rests upon, emitting harmonic frequencies that resonate directly with nearby wielders' magical potential, while its temperature fluctuates in response to surrounding arcane activity, growing warm during magical surges and cool during periods of stability.

The Omniscient Rune serves as an active prophetic guide that influences critical decisions during cross-league events, whispering insights about optimal magical synthesis pathways and warning wielders of impending realm conflicts before they destabilize reality.