15-second ultra-cinematic cosmic fantasy transformation sequence at the edge of the observable universe beyond galaxies and nebulae. A lone astronaut floats silently above a colossal spiral galaxy. Countless stars, colorful nebulae, black holes, and distant quasars illuminate the endless cosmic darkness. The atmosphere is majestic, timeless, and incomprehensibly vast. The camera slowly orbits around the astronaut while space itself begins to ripple. Constellations subtly shift position as if responding to an ancient awakening. A brilliant cosmic light emerges from within the astronaut's body. The transformation begins. Tiny galaxies become visible beneath translucent skin. Veins transform into glowing rivers of starlight while miniature constellations ignite throughout the body. The spacesuit dissolves into shimmering cosmic dust carried away by solar winds. The camera moves closer as the spine elongates gracefully. Celestial horns emerge from the head, formed from crystalline nebulae and rotating star clusters. Arms extend into elegant dragon forelimbs while scales of luminous galaxies spread across the body. The transformation accelerates. An impossibly long dragon body forms from spiraling galaxies, glowing nebulae, dark matter, and celestial plasma. Every scale contains entire star systems. A flowing mane of auroras and cosmic gas drifts through space. Massive whiskers made of pure starlight extend into the void while glowing cosmic antlers branch outward like living constellations. The surrounding universe responds. Comets change course. Asteroid fields begin orbiting the dragon. Gravity bends visible starlight while nebulae spiral around the immense celestial body. At the climax, the fully transformed Cosmic Dragon stretches across deep space at impossible scale, weaving gracefully between galaxies while luminous cosmic energy trails behind its movement. Final cinematic moment: the Cosmic Dragon coils around a brilliant spiral galaxy before soaring through a gigantic nebula toward the heart of the universe. The camera pulls back until the dragon becomes a magnificent constellation spanning the cosmos itself. Style: ultra cinematic cosmic fantasy, Eastern celestial dragon, living galaxy anatomy, nebula simulation, realistic gravitational lensing, dark matter effects, photoreal space visuals, colossal cosmic scale, divine celestial atmosphere, AAA visual effects quality, no text, no overlays. Audio: epic cosmic orchestral score, celestial choir, deep stellar resonance, ethereal synth textures, gravitational hums, shimmering starlight, evolving cinematic crescendo, transcendent cosmic atmosphere.