Board Thread:Lore Discussion/@comment-4057475-20130710075111/@comment-16047389-20140530192909

I'd assume that not all Dragon Priests had masks. It is likely that Ahzidal, Dukaan, Zahkriisos, and Miraak either made their masks, or received them from Hermaeus Mora when they joined him. I make this assumption based on the fact that all four masks share a "cthulian" style (Miraak's obvious tentacle mask, and if you look at the other three, they have less detailed tentacles etched into the masks), and that both Dukaan and Zahkriisos can summon Seekers, who serve Hermaeus Mora.