The Necromorph Hook Arm is a grotesque, biomechanical appendage with a hyper-detailed sci-fi horror aesthetic. It features a long, segmented structure resembling a mutated human arm, ending in a sharp, curved hook made of bone-like material. The surface is covered in pulsating veins, exposed muscle fibers, and patches of necrotic flesh, with a dark, metallic sheen on the segmented exoskeleton parts. The hook itself is polished and slightly reflective, contrasting with the rough, organic textures of the arm. The arm moves with an unnatural flexibility, suggesting a fusion of organic and mechanical components.