When the ten realms' conflicts reached perfect tension following the Arcane Fracture, their opposing forces crystallized into a singular entity of pure equilibrium. This sphinx emerged not from any single realm, but from the precise mathematical center where all magical contradictions achieve temporary balance, becoming the living embodiment of dimensional stability.

The Equilibrium Sphinx exists as a geometric construct that continuously shifts between the visual aesthetics of all ten leagues, its form adapting to reflect the current state of inter-realm balance. Ancient riddles inscribed in ever-changing glyphs flow across its crystalline surface, while its eyes mirror the real-time harmony or discord between the fractured domains. Its voice resonates with frequencies that can harmonize even the most discordant magical energies, speaking in mathematical equations that describe the fundamental laws of dimensional stability.

The Sphinx actively maintains the delicate equilibrium preventing total reality collapse by testing wielders who seek to manipulate cross-realm energies. Through its riddles and challenges, it ensures only those with true understanding of balance can access the most powerful synthesis abilities during convergence events.