A vibrant, stylized icon representing challenges in Overwatch 2, featuring a circular design with a bold, outer ring that glows with a dynamic energy effect. The center showcases a simplified, yet striking emblem of a rising star or trophy, symbolizing achievement, rendered in high-detail with a gradient color scheme that transitions from warm to cool tones. The surface is smooth with a glossy finish, and the icon emits a subtle luminous glow to stand out in the UI.