Shadow Creature with PixVerse C1

A shadow creature made of black smoke and glowing red eyes, constantly shifting form, tendrils extending outward
Expands rapidly across the city, engulfing everything, phasing through buildings and pulling objects into its mass
Nighttime city with flickering lights, fog mixing with shadows
Low tracking shot entering shadow mass, whip pans revealing internal movement, volumetric smoke simulation, camera partially obscured, eerie but intense atmosphere