Devil Shark Mask

Wondrous item, rare (requires attunement)

When you wear this burgundy face covering, it transforms your face into a shark-like visage, and the mask sprouts wicked horns. You gain a bite attack that deals 1d8 piercing damage and that counts as a magic weapon. You also gain a +1 bonus on attack and damage rolls made with your bite attack.

Additionally, you have advantage on Charisma (Intimidation) checks while wearing this mask.

Curse. The mask is cursed, and becoming attuned to it extends the curse to you. As long as you remain cursed, you are unwilling to part with the mask, wearing it at all times. If you haven’t used the mask to bite a living creature before dusk, you tear out a 7 chunk of your flesh. You take 2d6 necrotic damage and your hp maximum is reduced by an amount equal to the damage taken. This reduction lasts until the curse is removed. If your hp maximum is reduced to 0 as a result of this curse, you die, transform into a devil shark, and teleport to the nearest open body of water.