Last updated:
Armour of Persistence
Armour of Persistence
Very Rare Heavy Armour
20Magical Plate: All incoming damage is reduced by 2.
Legendary Persistence: You gain Resistance and Blade Ward.
Disadvantage on Stealth Checks
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.
Heavy Armour
Location - Armour of Persistence
Located at the 
Forge of the Nine. Sold by Dammon.
Discussion
You can buy these off Damon. In ACT 3, at the Forge of the Nine shop in the Lower City.
Act Three: Can be bought from Dammon at the Forge of the Nine in the Lower City of Baldur's Gate.