Neon-Energy Spirit in a Cyberpunk Castle Hall

An immense translucent energy being, a swirling plasma silhouette with flowing tendrils of electric light, hovering above a wet flagstone floor in a grand medieval castle hall. The scene fuses cyberpunk and fantasy: ornate stone columns and vaulted arches wired with glowing cables; rune-carved walls pulsing with circuitry; holographic banners flutter beside gaslight torches. Rain taps on high windows, beads on stained glass reflecting a neon cityscape beyond. In the foreground, armored knights in plate mail and cybernetic gauntlets stare in awe as steam vents hiss and skeletal drones perch on gargoyles. The energy being crackles with data streams and runic code, reshaping its form as sparks and ions dance in the air. Lighting is moody chiaroscuro with harsh neon accents, wet reflections on stone, and a soft volumetric glow surrounding the entity. Style: cinematic concept art, ultra-detailed, 4K, digital painting or matte-painting aesthetic.