A mystical twilight descends over a fantastical, lush Celtic realm, where verdant grass and vibrant wildflowers entwine with ancient ruins. The horizon is painted with a deep, dusky hue, as a dark sunset casts long shadows over the overgrown kingdom. Majestic trees, their leaves whispering secrets of old, stand tall against the twilight sky, creating an enchanting tapestry of nature reclaiming forgotten lands.