Adamantine Plate +3

You have a +3 bonus to AC while wearing this armor.

This suit of armor is reinforced with adamantine, one of the hardest substances in existence. While you're wearing it, any critical hit against you becomes a normal hit.

Originally a Helmed Horror found in Avernus

Plate consists of shaped, interlocking metal plates to cover the entire body. A suit of plate includes gauntlets, heavy leather boots, a visored helmet, and thick layers of padding underneath the armor. Buckles and straps distribute the weight over the body.

Notes: Immunity: Critical Hits, Bonus: Armor Class, Combat, Warding, Str. 15 Required, Stealth Disadvantage