Image imported from derpibooru 
Original Description:
 
Now to take a break from our not-so-regularly scheduled program! I got more story stuff planned, but now that I finally have that last part posted I’ve had some other things in the backlog.
 

 
Many moons ago, Cosmos and Discord brought total chaos upon Equestria. Neither them, nor any of the creatures trying to stop them notice the little one created in the destruction. They were born from all of this, with probably part of it being Cosmos’ twisted sense of love for Discord. Unfortunately, they relied totally on the existence of chaos from their “”“parents””” and disappeared completely when both were banished and turned into stone respectively.
 
Screwball is actually some kind of Draconequus, although the form they take almost completely depends on chaos magic. They returned once Discord returned, although without Cosmos, Screwball could only maintain a pony form. At least, that’s what other ponies called them, based on their cutie mark. Once Discord was reformed, Screwball remained as well, though still relied on chaos magic, just like Discord does. If Discord stopped using his magic, both he and Screwball would disappear. Neither Discord or Screwball recognize each other as family, and have hardly even met. In current Equestria, they spend their days exploring around and having fun with the creatures they meet, randomly popping in from just outside of view.