Osseous Plate
Armor,
Rare
(requires attunement; cost 3750 gp)
Crafting Components
Corpse of a humanoid blacksmith
This medium armor is made from the bones of several humanoids—ribs, shoulder, femurs and many others have been bound in leather and fused with necromantic magic—and while donned it imparts a touch of undeath to the wearer. While wearing this armor, you gain resistance to poison and necrotic damage, but also vulnerability to bludgeoning damage. As a bonus action, you can make the bones rattle to gain advantage on the next Intimidation check you make this turn against a humanoid. It is in all other ways similar to chain mail, except that you don’t have disadvantage on Stealth checks while wearing it.
Source