Quigars often shed their horns seasonally, like deer.  ...technically, that makes them antlers, doesn't it? Ugh, terminology.

Your quigar's horns seem to come and go, they can fall off whenever you like. You can draw your quigar as being hornless OR having horns at any time.

• This trait is a modifier, and as such, must be combined with other types of horns instead of being the only horn trait.

NOT ALLOWED:

• Cannot be the quigar's only horn trait.

If you're unsure if your idea is valid, feel free to ask.