Dreams featuring graveyards often symbolize reflection, endings, or transformation. The presence of a girl riding a unicorn suggests innocence and purity, as unicorns typically represent hope, magic, and the beauty of imagination. The girl's short hair and glasses might indicate a unique perspective or intellect, while her white dress adorned with flowers symbolizes purity and new beginnings.

The unicorn's horn made of knives could represent the duality of beauty and danger, suggesting that something that appears magical might also have a darker side or hidden challenges. This could reflect a situation in your life where you feel torn between the allure of something wonderful and the potential risks involved.

Overall, this dream may be encouraging you to explore the balance between hope and caution in your waking life. Consider what aspects of your life need reflection or transformation, and how you can embrace the magic while being aware of any potential dangers.