A dark psychic battleground with an off-center perspective, where glowing purple runes on a cracked black floor extend diagonally. Jagged floating crystals and arcs of dark energy surround the arena, with the central focus shifted to the right. Ominous storm clouds with flashes of purple lightning fill the sky, blending into a dark starry background. The environment feels immersive and foreboding, emphasizing depth and a mysterious, otherworldly atmosphere.