Armor of Invulnerability

Dungeon Master's Guide (2024) p. 286

Type
Heavy Armor
Magic
Yes
Rarity
plate armor, legendary (requires attunement)
Weight
65
AC
18
Strength Requirement
15
Stealth Disadvantage
YES

Description

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.