Capture the ethereal essence of a majestic, mystical unicorn standing amidst the enchanting beauty of a magical forest. The unicorn's mane and tail flow with a mesmerizing iridescence, shimmering with all the colors of the rainbow in a harmonious dance of light. Its coat, a sparkling silver canvas, is adorned with delicate patterns of stars and phases of the moon, adding a touch of celestial elegance to its form. 
Surrounding the unicorn, the lush forest comes alive with ancient, towering trees whose luminescent leaves cast a soft, otherworldly glow upon the scene. Delicate flowers in shades of blue and purple bloom at the unicorn's hooves, adding a pop of color to the verdant landscape. A gentle stream meanders through the forest, its crystal-clear waters reflecting the magical ambiance of the surroundings.
The background exudes a soft, ethereal glow, enveloping the entire scene in a dreamlike quality that transports the viewer to a realm of fantasy and wonder. Fireflies dance in the air, their soft glow adding a touch of whimsy to the enchanting atmosphere. Soft beams of light filter through the canopy of trees, creating a play of light and shadow that enhances the mystical allure of the forest.