The Stalker Heart is a high-tech, organic-mechanical component harvested from the robotic Stalker creatures in Horizon Zero Dawn. It features a central core with pulsating blue energy veins, surrounded by intricate metallic plating that mimics biological structures. The surface is a combination of smooth, polished metal and rough, weathered textures, with glowing blue accents that highlight its vital function. The heart is asymmetrical, with a complex network of tubes and wires that suggest advanced machinery, yet retains an organic, almost lifelike appearance.