Create a charming clipart of a will-o'-the-wisp with a whimsical and soft-glowing appearance. The background should be plain and high contrasted to make the sprite stand out. Let's go for a cartoon-style illustration that is playful and cheerful. Make sure the will-o'-the-wisp looks magical and enchanting, with a friendly expression that will captivate viewers. Bring out the essence of this mystical creature, while keeping the illustration simple yet beautiful.