Create a dramatic magical portal matching the provided reference. Shape: vertical oval vortex with swirling smoke and flowing root-like tendrils at the base. Style: high-detail, cinematic, organic stone frame with deep cracks. Color tone: shiny-white — pale metallic/stone frame with bright white-cold glowing veins and radiant core, cool rim light. Lighting: strong emissive cracks, subtle rim light, volumetric particles/embers. Output PBR-ready texture look, transparent background, high-frequency detail, photoreal-stylized. No watermark or text.

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