Broken Shield

Broken Shield is an item from unimplemented mechanic of shields getting destroyed during Iron Crisis, similar to how destroyed iron weapons end up being Broken Weapons.

From what can be found in game files, it was supposed to work on a same way as the mechanic behind weapon breaking, replacing a regular items with their broken equivalent.

In-game description
"The iron crisis sweeping across the Sword Coast region seemingly knows no mercy. This once fine shield now lies in a mangled heap of wood and metal before you."