Undead Antler Masks were not very common before the update. Now almost everyone has atleast one. However if you introduced a new Dark Antler Mask, it would make people stand out again

It could be a simple black variation of the Undead Antler Mask and you could also make multiple types by changing the glowing color to blue, green, and red

-You could create pink and purple masks and make them farmeable
-Make the Blue, Green, and Red Dark Antler Masks for sale from the vendor for 400 platinum