Create an image of a majestic creature resembling a unicorn, but with vibrant purple fur instead of white and a mane of swirling silver. Instead of traditional wings, give it feathery, shimmering fins extending from its sides, resembling those of a fantastical fish. Surround the creature with a backdrop of swirling, colorful mist, blending shades of teal, gold, and soft pink, with a glowing orb of light at the center that provides a mystical ambiance. The creature should appear to be in motion, gracefully leaping through the clouds.