I was thinking of a concept of a curling mass of snakes as part of the hair. I was thinking that each snakehead could be a drone of somekind so that they have the autonomy to run along the head. I also thought it would be neat for either a few of them or all of them could detach and be independent. All of them could have a poisonous bite as well.

So how much would it cost and what would the essence cost be?