The Spriggan Stone is a small, mystical artifact resembling a smooth, polished pebble with intricate glowing runes etched across its surface. Its shape is organic and slightly asymmetrical, with a warm, golden hue that pulses faintly, suggesting an inner magical energy. The stone's surface is smooth to the touch, with the runes providing a subtle textured feel, and it emits a soft, ambient light in darker environments.