A grand, ancient mystical portal, circular in shape, is constructed from heavy, weathered dark grey stone blocks, forming a thick, imposing ring. Its surface is rough and tactile, deeply inscribed with glowing ethereal blue runes that emit a soft, otherworldly light. The center of the ring is a completely empty, dark void, devoid of any visible effects or light, suggesting an open gateway to an unknown space. The entire structure stands firmly on a base of large, flat stone slabs.