This is just a recolor and added graphics to give male 
nightingales a dark reaper look.

* thats right, only edited for male chars.
 
You may find that the mask works on female characters, 
but to be honest, i am not sure.

add .dds files to: 
\Program Files (x86)\Steam\steamapps\common\Skyrim\

Enjoy!
--D_Sagz--