A massive arched gateway formed from intertwining obsidian and jade, glowing faintly with ancient runes etched into its surface. The portal at its center swirls with emerald light, hinting at a mysterious world beyond. The surrounding landscape is a mix of jade-covered ruins and obsidian shards, with vines of glowing jade snaking up the sides of the gateway. The scene is illuminated by a green aurora in the obsidian sky, adding to the sense of wonder and adventure.