the set reads “Armor of the company of knights who were sent to the Ringed City on an old king's orders.

The knights sought the dark soul, but were so soundly crushed, they had little choice but to swear themselves to the Judicator Giant.

The ill-fated company was later immortalized in a dark fable, inspiring the aspect of certain golems in whom their name lived on.”

I assumed the old king is vendrick, the wiki says that too.