The name of the unique could be "The Boogeyman" and it is like a regular boogeyman but it does 100% more damage to enemies that have bare feet (meaning no fur or something covering the feet). It's unique saddle could give 300% more damage to exposed feet and other buffs that are normally with unique saddles. It could have a legendary saddle that adds 900% damage to bare feet and also having other good legendary saddle buffs but in return all dinos that don't have bare feet do 150% (can be adjusted to fit balancing) more damage to The Boogeyman.