New to battling. is it 1v1?

New to this whole thing, I was wondering if there is anything where you just say a concept and people make their own design relating to it.

i.e. If I suggested “a fake knife” as the subject matter, and everyone would put their own interpretation of a knife (without using a picture of a real one)

cuz for some reason, i have a bad hankering to try and photoshop a fake knife from my imagination, and I was wondering if there was any way to constructively apply that to a forum