I guess it has to stay a set, or else!
It seems the Prince got himself in a bind now, he is gonna have to hang up a lot of tapestries to hide those wall cracks. His intentions were to keep the world safe from the horns, but even his own tower is in jeopardy with these things hanging around, and they seem to now have a life of their own!
I suppose this is a nice time to get into some Forgotten Order Lore. A Fanui's horns contain all of their magic, and some say an imprint of their very soul as well. You can imagine that the Great Faun King's horns are filled with nothing but madness and rage (he wasn't a pleasant guy at all).
If you think back to our last chapter, you may remember Maeve's 4 horned henchmen seemed a little peculiar, turns out having another set of horns on your head may do some screwy things to your mind, I wouldn't recommend it.