Picked from the corpses of undead soldiers, the Undying Plate seems to be normal plate armour. When worn however it has some interesting effects.

You have a +1 bonus to AC while wearing this armor, but for every hour worn, the player suffers one day of exhaustion. 

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: Disadvantage: Ability Checks, Exhaustion, Combat, Warding, Str. 15 Required, Stealth Disadvantage