The Black Iron Greatshield is a specialized greatshield that is effective against enemies that deal Fire damage. Its respectable stability, low weight and 100% physical damage absorption also make it an ideal all-around greatshield. Because many enemies in the game are capable of dealing fire damage with various attacks, the Black Iron Greatshield is very effective at protecting players against threats in Lothric Castle, such as the hollows wielding Firebombs or Exploding Bolts, and the Thralls wielding fire-infused weapons. It can be particularly useful against bosses that deal physical and fire damage, such as the Old Demon King and Lorian, Elder Prince.
However, this greatshield's primary weakness is its low Lightning defense, barely absorbing half of any lightning damage that it blocks. This can make it a poor choice against certain foes, particularly Dragonslayer Armour and Nameless King.
Reinforced with Titanite.