The dullahan necklace is just an accessory. It just looks neat with its black flames, gives a miss chance (due to lacking a head) and adds fire damage to attacks.
cool. well looking forward to what comes next. and looking forward to seeing what the sheepkin look like. also if this game ever came to steam i'd be very happy since then it'd be easier for me to update the game to current version, and to find it in my steam library. plus depending on how well things go you could even put in some point shops items. but I know steam can be very fickle and somewhat infuriating at times so I would understand if you wouldn't want to.