Act as a fantasy concept artist with 10 years of experience in creating enchanted artifacts. Design a mystical stone that glows faintly with an eerie [COLOR] light, covered in ancient [SYMBOLS] that pulse rhythmically. The stone should appear semi-transparent, with swirling [MIST] inside that forms fleeting faces when whispered to. The texture should be smooth yet slightly cracked, as if holding immense power barely contained. Surround the stone with an aura of mystery, perhaps floating above a weathered pedestal in a dimly lit, forgotten temple. The atmosphere should evoke both wonder and unease, as if the stone is alive and watching.