Wild Hunt, Shadow-Hunters: Project Manticore

Some monsters are created.
Others are unleashed.
When unexplained massacres ripple across a remote corner of the world, the Wild Hunt’s most secretive division is activated. Led by battle-hardened veterans and bound by oaths older than nations, the Hunt is accustomed to facing the impossible.
They are not prepared for what waits in the dark.
As a creature born of forbidden science and ancient myth begins its rampage, the Hunt is forced into a race against time—tracking a beast that learns, adapts, and kills with terrifying efficiency. Every engagement costs blood. Every mistake brings the end closer.
For LtCol Jayce Constance, the mission becomes personal when his nephew Kirk Becker is drawn into the fight—awakening something buried deep in his bloodline. What begins as a battle for survival becomes a reckoning, forcing the Hunt to confront not just the monster they face, but the price of becoming what is needed to stop it.
Behind the carnage, unseen hands move with purpose. The Manticore was never the end.
It was only a test.