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Prompt

Create a hyper-realistic cinematic frame, with the appearance of an official teaser for a dark premium series in the Harry Potter universe, using visual language inspired by HBO’s new approach: denser, more physical, more monumental, and more realistic. The scene takes place at the bottom of a deep, cold, and ancient lake during the underwater task of the Triwizard Tournament, with an oppressive, silent, and biologically alive atmosphere. The camera must be submerged, positioned lower, farther away, and slightly sideways, as if secretly observing the action from behind ruins and seaweed, conveying a sense of espionage, scale, and real danger. The composition should be clearly built in three planes.
In the foreground, out-of-focus elements invade the lens: long seaweed, stone fragments, dense particles, suspended sediment, small fish, and parts of the aquatic biome, creating real depth and cinematic three-dimensionality.
In the midground, the female character, faithful to the reference image, appears slightly off-center and crossing the scene diagonally with silent urgency, as if she has just noticed something emerging from the submerged temple. She should not be posing; she must look captured in the middle of a real action, swimming with genuine physical effort against the water’s resistance. Her body must convey natural tension, with a tilted torso, legs in coherent propulsion, active muscles in her legs and arms, clothing reacting to drag, and long hair floating with realistic weight and natural movement in the water.
The spell must be explicitly the Bubble-Head Charm, forming a perfectly transparent, spherical, and physical air bubble around only her head, with realistic optical refraction, adhered microbubbles, slight distortion at the edges, and true interaction with the scene’s lights. Do not include any mask, helmet, diving suit, or bubble around the entire body. The costume should follow the logic of the Goblet of Fire, with a house sports t-shirt or shorts adapted for a girl, realistic fabric partially clinging to the body, weighing down in the water, and moving naturally.
In the background, reveal an abandoned submerged temple with ancient magical ruin architecture: broken columns, sunken staircases, eroded arches, a dark portal, deep cavities, stones covered in moss, greenish biofilm, vegetation clinging to the structure, aged coral, and sections disappearing into darkness. The biome must look authentic and tell a story: abundant seaweed, cold aquatic plants, sediment, heavy mineral water, sunken branches, small schools of fish, discreet corals attached to the ruins, time-worn stones, texture in all materials, and a real feeling of an ancient and forgotten ecosystem.
Include mermaids in the dark and unsettling interpretation of the Harry Potter universe, faithful to the film’s imagery, with slender anatomy, wet and animalistic appearance, and a threatening presence, observing from afar between columns, shadows, and vegetation like silent predators. They should appear partially hidden, never too frontal, reinforcing the threat without stealing the scene.
The lighting must be premium and realistic, built with three light sources. The first comes from the distant surface, with cold and dramatic beams piercing the water from above, revealing particles, fish, seaweed, and parts of the temple. The second comes from the wand in the character’s hand, emitting a warm yellowish light, elegant and localized, subtly illuminating her face, the bubble, her arm, the t-shirt, and nearby ruin details. The third comes from the temple itself, like a residual source of ancient magic, weak, mysterious, and partially hidden, creating depth and visual attraction. Additionally, a very subtle rim light should outline the character, the edges of the ruins, and sections of the seaweed. The shadows must be greenish, deep, damp, and menacing.
Include underwater caustics and murky water reflection.

3953 / 10000

Based on: Submerged Secrets: The Underwater Trial of the Triwizard Tournament

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