Blackguard's Plate is a very rare Heavy Armour.
To break one's oath is a dangerous game - it marks you as a faithless cur, an exile without a cause. The armour is tempered by an age of rocks, blades, and persecution turned against it - and is buffed by the immutable, unbindable will of its wearer.
Properties
19
Armour Class
Heavy Armour 
Required Proficiency: Heavy Armour
Rarity: Very Rare
Weight: 20 kg / 40 lb
Price: 6400 gp
Special
The wearer of this item gains:
- Magical Plate: All incoming damage is reduced by 1.
- Advantage on Wisdom Saving Throws Checks.
Disadvantage on Stealth checks.