A mystical twilight scene over a fantasy Celtic realm enveloped in lush greenery, where ancient ruins peek through overgrown grass and vibrant wildflowers, casting shadows in the dim light. The horizon glows with the last rays of a dark sunset, illuminating the landscape in a mysterious, otherworldly hue. Towering trees draped with moss frame the scene, their branches swaying gently in the evening breeze, as the kingdom whispers tales of old magic and timeless beauty.