Abyssal Mask

Adventuring gear (wondrous item, head), very rare (requires attunement)
This purplish mask evokes a sensation of anguish. The face of Abyssal Mask was made from a splintered portion of flair text from some fiend somewhere.

Unmake

As an action, you choose one creature you can see within 30 feet of you, cursing it and tearing away their defenses until the end of your next turn. The next instance the cursed creature is damaged, the creature has vulnerability to all of that attack's damage, and then the curse ends. If the cursed creature has immunity to any of that damage, the immunity is reduced to resistance for this instance of damage.
You can use this feature once per day.

Item type

Magical

Rarity

Very Rare

Weight

1 lbs.

Base Price

5,000 - 50,000 gp