If a human /human shaped creature were to have a horn, horns or crest on their head, what shape, positioning and number of horns would be the best for the most damage?
The human will be very muscular and almost like a wild animal, maybe even on a leash by its master, when let to run free it just attacks in a rage violently headbutting whatever is in its way, using its hands to grab or pin their victim down as it keep headbutting them until their skull is smashed down into a bloody mess.
It doesn't need to make evolutionary sense having the horn so the horn can be any shape, if the horns/ crest are on the larger side more muscle can be added to the creatures neck structure an other body parts if needed.
Edit : the creature will be an individual not a race, it will be kept in a cage most times until it is needed but the story is set in urban areas and forests at times so really wide horns may not work, im also thinking the creatue will have a build closer to a gorilla with elongated arms so it has more range and strength for grabbing hold of people.