This is Magic the unicorn.
This information is from the website, The Kids Window:
Both kids and adults are enchanted by the pictures and tales of this legendary creature that has the shape and looks of a horse but also has a magical, spiral shaped horn growing from it’s forehead. These prancing, dancing animals are often described as possessing many different powers including the ability to become invisible at will and the ability to fly. Winged unicorns are also called Pegasi.
Myths and legends about the unicorn have been known and discussed for hundreds of years. One legend says that you can find these mystical creatures only during the light of the full moon. The horn will twinkle and shimmer in the moonlight and this sparkling light will lead you to where they are grazing. Most of the pictures of unicorns show animals that are Snow White in color, but a few are the color of ebony. Their horns are always gold or silver colored and the shape of the horn is shown as a spiral.
You can read more about unicorns here.