Armor of Invulnerability

Armor (Plate Armor), legendary (requires attunement)

You have Resistance to Bludgeoning, Piercing, and Slashing damage while you wear this armor. Metal Shell. You can take a Magic action to give yourself Immunity to Bludgeoning, Piercing, and Slashing damage for 10 minutes or until you are no longer wearing the armor. Once this property is used, it can't be used again until the next dawn.

Armor of Invulnerability is from the System Reference Document 5.2.1 (“SRD 5.2.1”) by Wizards of the Coast LLC, used under the Creative Commons Attribution 4.0 International License. Full attribution is on the Licenses & Attribution page.