Yes it does.. heres from first page near the top in 'tips':
Complete the Fabled Fawn Storybook event goals and win the Horn of the Fawnicorn!
* If you complete the Fabled Fawn Storybook event, you will win the Horn.
* Use the Horn to craft either the Fawnicorn or the Enchanted Fawnicorn in the Magic Forge BEFORE 7/23 @ 6PM PT. Craft takes 3 hours and must be collected prior to the end of the event.
Fawnicorn - 10 Meadow Sap, 1 Horn of the Fawnicorns, 25 glimmerdust
Enchanted Fawnicorn - 10 Sunburst Petals, 1 Horn of the Fawnicorns, 25 glimmerdust
What you do is at your own risk.. I don't see it as possible.. in less than an hour.
EDITED TO ADD FAWNICORN DROPS: blue petals, coins