Generate a series of terrifying, detailed images set in the ancient ruins of the Coliseum in Rome. Depict modern-day characters Ana and Luis being pursued by ghostly apparitions of Roman gladiators and wild beasts. The images should include dimly lit underground tunnels and exposed arenas, with ancient stone walls showing cracks and decay. Capture the haunting atmosphere with cold, oppressive darkness, where shadows seem to move with a life of their own. Show Ana and Luis experiencing moments of sheer terror as they are touched by invisible hands and confronted by spectral figures with empty, anguished expressions. Include ghostly lions emerging from the shadows, their ethereal forms blending with the crumbling architecture. The lighting should be minimal, with flickering shadows creating an atmosphere of dread and isolation, emphasizing the sense that the characters are trapped in a nightmare from which they cannot escape