Animated Short: Rondo Across Countless Kalpas | Honkai: Star Rail

The dual planets were intertwined in each other's tragic destiny, dancing an eternal rondo around a pitch‑black great sun. In the beginning, one of the planets gave rise to humans who named the land below "Izumo" and the world above "Takamagahara." The demonic Kami from Takamagahara descended, overturning skies, burning rivers and oceans, and shattering the land. Realizing it was not an invasion but a massacre, the people of Izumo embarked on a Kami‑slaying journey, forging the first Edict Edge and battling the "Sovereign of Revelation." With this power, they repelled one Kami after another, sacrificing countless lives and forging the twelve Sentinels. In a merciless fight for survival, themight of the Edict Edges illuminated the land into neon cities within ten Amber Eras. The distant Takama Divine Realm, once far away, became within reach—yet history halted abruptly, and the existence of both planets evaporated into nothingness. Today, the past of Izumo can only be gleaned from scattered whispers. Scholars debate its disappearance, yet none can solve the mystery. Was Izumo a fabricated story, or a causative anomaly forestalled by reverse causation? Was it another horrific experiment, or a sign of the cosmos' voracity? Only the pitch‑black great sun knows the answer, and the universe follows an eternal recurrence, leaving Izumo as a mere footnote.