The Bellowback Heart is a vital component harvested from the robotic Bellowback creatures, resembling a high-tech organic heart with a central core encased in a metallic shell. The core glows faintly with a blue or orange hue, depending on the Bellowback's type, surrounded by intricate circuitry and fluid-filled tubes that mimic vascular systems. The exterior is a combination of smooth, polished metal plates and weathered, textured surfaces showing signs of wear and battle damage, with occasional scorch marks from the creature's flame attacks.