Craft a game asset that encapsulates the essence of a dramatically stunning, ultra-realistic mermaid. This mermaid, caught in a dynamic 'Siren's Call' pose, should exude an enigmatic charm with her soft, ambient-lit underwater realm as the backdrop. Her scales shimmer with varied textures, reflecting the iridescent hues of the ocean, complemented by a detailed shell crown and necklace. Her hair, intertwined with seaweed, flows naturally, enhancing her mystical allure alongside subtle glowing bioluminescence that highlights her form. Surround her with a rich tapestry of corals and sea plants, adding depth and life to the scene. The water around her is alive with dynamic splashes and rippling reflections, capturing the serene yet powerful essence of the underwater world. Ensure the color palette emphasizes the magical ocean hues, and the overall composition is optimized for game environments, maintaining a balance between artistic expression and technical detail.