Armor of Vulnerability

This armor grants you resistance to one of the following damage types: bludgeoning, piercing, or slashing. The type of damage is determined when the armor is created. **Cursed.** Once attuned to this armor, you are _cursed_ until you are targeted by __remove curse_ or similar magic; removing the armor does not end it. While cursed, you have vulnerability to the other two damage types this armor does not protect against.

Source: Level Up Advanced 5e · OGL-1.0a · 5.1