What if it had a strong possession aura like purple,black or red, and it has symbols of the souls it has collected by killing people and trapping their spirits [these are just ideas so if u don't wanna do it then u don't have to)
Well thats what i wanted to do for Kumu, but i couldnt cuz the background is colored in the same frame so i would need to redo the whole scythe, but the souls are a good idea!