The Sawtooth Heart is a mechanical component harvested from the robotic Sawtooth creatures, resembling a fusion of organic and synthetic design. It features a central core with pulsating blue energy veins, surrounded by intricate metallic plating with a weathered, battle-damaged appearance. The surface is a mix of smooth, polished sections and rough, textured areas where natural elements have eroded the metal, giving it a post-apocalyptic aesthetic.