Please help me create a 20-second video, vertical 9:16 aspect ratio, using…

Please help me create a 20-second video, vertical 9:16 aspect ratio, using Seedance2.5 Style: 100% photoreal live-action, viral iPhone documentary footage, subtle handheld breathing, imperfect framing, occasional autofocus hunting, slight rolling shutter, natural motion blur, realistic night exposure and physics, practical-looking VFX. Please use Seedance 2.5's 20-second single-shot generation capability to create a complete 20-second video file. My motion chain is only used to control the rhythm and editing points within the same 20-second video. [Global Setting] Base Environment & Texture: A sprawling medieval fantasy landscape at golden hour, dense ancient forest with towering oak trees, misty valleys, distant stone castle visible on a hilltop, overgrown stone ruins scattered in clearings, warm amber sunlight filtering through canopy, lush green grass, epic fantasy adventure aesthetic. [Character Identity Lock] @Character Reference【IMAGE】 Use the uploaded character image as the ONE AND ONLY human character reference. Use it directly. Do not redesign or reinterpret the character. Keep exactly the same identity, face, hairstyle, body proportions, clothing, and overall appearance. [Dragon Identity Lock] @Dragon Reference【IMAGE】 Use the uploaded dragon image as the ONE AND ONLY dragon reference. Use it directly. Do not redesign or reinterpret the dragon. Keep exactly the same dragon identity, head shape, horn structure, body proportions, wing shape, tail design, scale pattern, color distribution, silhouette, and overall appearance. [Opening beat, 0–3s]: Wide shot of the forest clearing. The human runs full speed away from an unseen threat, breathing heavy, desperation in the movement, camera follows close behind. The human clutches the magical staff, energy crackling faintly around it. Suddenly the human stops at the cliff edge of a vast valley, no escape route left. The human turns to face whatever is chasing them, raising the staff. [Mid beat A: Normal speed (3–8s)]: The human plants the staff into the earth. Magical energy explodes outward in a shockwave of golden light. The body begins to glow intensely, eyes flash pure gold. Camera pulls back to wide as the transformation begins—the form starts to shimmer and distort, edges blur with magical light. The body contorts slightly as muscles expand and strengthen, the silhouette beginning to enlarge. Screams of pain mixed with roars of power. The clothing tears and shreds as wings begin to form from the shoulders, scales sprouting across the skin. [Mid beat B: SLOW MOTION SECTION (8–13s)]: Time slows to 35% normal speed. The transformation reaches its crescendo. Camera orbits the figure capturing the full metamorphosis. The human form stretches and shifts, limbs elongate into powerful legs with claws, a massive tail erupts from the spine whipping outward in the slow air, wings unfold to their full tremendous span catching golden sunlight (creating a silhouette against the sky), head transforms into the dragon head defined by @Dragon Reference, with its exact shape, horns, ridges, and silhouette preserved. Golden light pours from every seam of the new form. The staff dissolves into pure energy flowing into the dragon's core, merged completely. The final human features fade—the character is no longer human but pure dragon, powerful and magnificent. Return to normal speed. [Mid beat C: Normal speed (13–19s)]: The dragon stands atop the cliff face, fully transformed, throwing its head back and releasing a primal ROAR that echoes across the valley below. Smoke and embers pour from its nostrils, eyes blazing with power. It spreads its massive wings wide, testing the air currents. Camera pulls back to epic wide shot showing the dragon's full scale against the landscape. With a powerful downstroke of wings, the dragon launches itself off the cliff edge, catching thermals, climbing higher and higher. Camera follows in a soaring tracking shot as the dragon banks hard left, then right, wings catching golden sunlight, clearly reveling in newfound flight power. [Closing beat, 19–20s]: Aerial shot from high above. The dragon becomes a silhouette against the golden sunset sky, wings spread wide, flying freely over the medieval landscape below. Castle in the distance looks tiny. The dragon climbs toward the sun itself, roaring once more—a cry of absolute freedom and unleashed power. Camera pulls back further to show the vast sky, the tiny dragon a speck within it, pure majesty. Fade to golden light. Audio: There is no background music, only SFX. Heavy footsteps and labored breathing as the human runs, magical humming building, pain-scream morphing into dragon roar during transformation, bones and muscle sounds (wet, organic shifting), during slow-motion section: transformation sounds stretch and deepen (magical crescendo becomes a haunting tone, the staff's dissolution creates a crystalline chime), full dragon roar at the moment of complete transformation (powerf through the music, wind whistling through massive wings in flight, fade to silence with just wind and distant echoes.