Shapshift. This mask has 3 charges. You can expend 1 charge while wearing it to cast disguise self. The mask regains 1d3 expended charges daily at dusk. You do not gain any of the benefits of the race that you transform into. For someone to see past the illusion, they must make a DC 16 Intelligence check. 

The Mask Master. Creatures who haven't attuned to the mask can still use its properties but they have a difficult time with it. When putting on the mask while not attuned, the DM determines what form you take.