Viconia's Walking Fortress is a legendary shield that can deal 
Force damage when hit. Gives 
Advantage on saving throws against spells and 
Disadvantage to spell attacks made against the wearer.
'Walking Fortress' is a defensive technique reliant on a shield of this caliber. It involves upsetting your opponent who just wants to land a single blow.
Properties
+3
Armour Class
Required Proficiency: 
Rarity: Legendary
Weight: 2.7 kg / 5.4 lb
Price: 760 gp
Special
The wearer of this item gains:
- Rebuke of the Mighty: When a foe hits you with a melee attack, you can use your
Reaction, dealing it 2-8Force and knock it 
unless they succeed a Dexterity 
Saving throw. - Spellguard: You gain Advantage on Saving throws against spells. Spell
Attack rolls against you have Disadvantage. - Can cast
once per Short Rest. - Can cast
.
Where to find
- * Unknown