The Ancient Key is a medium-sized, intricately designed artifact with a symmetrical, geometric shape, featuring a central circular hub from which three angular arms extend, each ending in a unique, machine-like sigil. The surface is made of a dark, weathered metal with a slightly reflective finish, adorned with glowing blue circuit-like engravings that pulse faintly, suggesting a dormant technological power. The edges are worn and slightly dented, indicating age and previous use in a bygone era.