Ancient bearded man on crystal throne holding cosmic orb

An ancient, wizened old man with a long, flowing white beard sits on a throne carved from a giant, glowing crystal. He holds a cosmic orb that swirls with nebulae and distant galaxies. The setting is a vast, ethereal cavern filled with bioluminescent flora and shimmering stardust. The style is dark and moody, with dramatic lighting casting deep shadows, reminiscent of Zdzisław Beksiński's surreal landscapes and the intricate detail of mosaic art.