Not sure if this fits in on this thread, but it could still be seen as a story idéa.
Why are there no more than three stories on this site about Bicorns?
For those that don't know, bicorns are often described as fabulous beasts that are part-panther, part-cow creature with a human-like face, according to European satirical works of the Middle Ages and Renaissance.
However, modern media have created a more equine version of the beast.

Now bicorns are more seen as an opposite to a unicorn, instead of having one horn, it has two. Unicorns are said to only be ridden by pure maidens (virgins), while bicorns can only be ridden by those that are impure. Basically, it's seen as a demonic horse instead.
When you search "bicorn" on this site, only three stories show up! You would think that stories about equine creatures in Equestria would be more popular or common than this.

7605291
A few things I read about Bicorns is that they naturally look like either a goat or hybrid of a goat and horse, they also have the ability to alter their form to be more horse-like or more goat-like. They actually try to consume "faithful" individuals when they get a bit too close.

7605295 Like this?

7605291 Or, I don't know, maybe this:

7605295
They were the opposite of unicorns. They would become hostile to pure individuals and the impure and unfaithful would be allowed on their back.