Awakened Mask of the Moon Weaver

When not worn, The Mask appears as a simple white porcelain mask with very plain features.  When put on by any creature, however, it immediately transforms into an exact replica of that creatures face, appearing as though the creature had no mask on at all.  While attuned to and wearing this mask, you can use an action to cast the disguise self spell from it at will. The spell ends if the hat is removed.  You are also immune to mind-affecting spells and effects.  You are also immune to gaze attacks.  

Notes: Immunity: Charmed, Deception, Headwear