Armour of Persistence is a very rare Armour sold by Dammon during Act 3.
Great sheets of steel were hammered and bashed into something like a carapace, thick and dense - you can almost feel the hammer blows, flooded with rich magic.
Properties
20
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 2.
- Legendary Persistence: You gain Resistance and Blade Ward.
Disadvantage on Stealth checks.
Where to find
Sold by Dammon at the Forge of the Nine in the Lower City of Baldur's Gate.