Shang Tsung's Soul Jar is a sinister, ornate vessel designed to contain the souls of the defeated. The jar features a bulbous body with intricate, demonic carvings that seem to writhe under certain lighting, suggesting the trapped souls within. Its surface is a dark, polished stone with veins of glowing green energy pulsating through cracks, symbolizing the life force it holds. The lid is crowned with a small, grotesque figurine of a tormented face, serving as both a handle and a warning of the jar's dark purpose.