This symbiotic mask— made of thin bone and sinew — pulse with a life of it's own. To attune to it, you must wear it for the entire attunement period, during which the mask bonds to your face.

While attuned to this mask, you gain one of the following proficiencies (your choice when you attune to the mask):

• Arcana
• One kind of artisan's tools of your choice
• One kind of vehicle of your choice

When you make an ability check using the chosen proficiency, you add double your proficiency bonus to the check, instead of your normal proficiency bonus.

Curse: The mask can't be removed from you while you're attuned to it, and you can't voluntarily end your attunement to them. If you're targeted by a spell that ends a curse, your attunement to the mask ends, and they can be removed.