n ancient magical artifact in the shape of a perf...

An ancient magical artifact in the shape of a perfect circle. The center is a swirling vortex of solar fire and plasma. The outer rim is made of dark obsidian stone engraved with glowing ancient runes and historical hieroglyphs. No eyes, no mouths, no faces. Dark fantasy atmosphere, mystical energy, unreal engine 5 render, isometric view, centered composition. --ar 1: