Professor Elias Thorne didn’t believe in ghosts, but he believed in echoes. For twenty years, he had tracked acoustic anomalies in the Amazon basin—sounds that shouldn’t exist in the modern world.

There, grazing on giant horsetails, was a family of . Their pebbled skin was a dull olive green, blending perfectly with the prehistoric flora. They weren't the monsters from the movies; they were graceful, rhythmic, and hauntingly real.

But the peace was short-lived. A low, vibrating growl shook the very marrow of their bones. From the dense canopy emerged a predator that evolution had only refined, not erased: a . It moved with a terrifying, bird-like precision, its yellow eyes locked on the researchers.