This is a neat idea from Etsy boutique idolatre. Colourful, tentacle patterned, curling goat-like horns that fit to your head and make you look like some Elder God Succubus.
They’re not cheap, though, but are made by hand from plastic resin. On the product page you can pick the colour scheme and a handband colour.
I think these horns could be the standout costume feature for a very interesting LARP colour or a key part of costume design for any webseries character. They’re that good.
(Hat tip Geek Girl Diva.)