Flurry Heart's Cutie Mark · 6:29am August 20th
Nothing much but an image I've made*:
The quality is ew cause I resized (a lot) the image after finishing it.
This is merely my take on what would her Cutie Mark** be. Basically, a fusion of Cadance's crystal heart and Shining/Twilight's asymmetrical star. Also, I picked Twi's version of the star since it kinda looks better to me.
* Even though I made the image by cropping and editing, I used—as a base—the pictures of Cadance's and Twilight's cutie marks, which I will give a link to the sources where I took them from, below.
**In the game by Gameloft, Future Flurry Heart does have a defined C-Mark, however I just... don't like it 
Finally, I just wanna say that there might be many other people who have already thought about or made a similar design for Flurry's Mark. But, heh, I guess it still feels good to share something, whether it's new or not.
Source of the base-images
Headcannon accepted! That is a way better design than others I've seen. Also, for personal reasons I really like the fact you used Twilight's star specifically for the image. That just makes me very happy.