Create an ultra-stylish depiction of the back side of a tarot card with a slightly modern and unique twist. The design should feature intricate and elegant circular motifs, creating a harmonious and balanced pattern. Incorporate elements of fantasy and mysticism, using swirling lines and ethereal textures to enhance the fantastical atmosphere. The color palette should include deep, rich tones and soft, glowing highlights to evoke a sense of mystery and enchantment. The overall aesthetic should exude sophistication, elegance, and a sense of otherworldly beauty, making the card back visually captivating and unique. --s 500 --c 10 --niji 6