The set requires a character level of 70, and, while technically it can be worn by any class, specifically boosts Crusader skills. The set is named after Vizjerei invokers who used this armor to protect themselves against the demons they summoned. Lore-wise, this armor got into Crusader Order when Olenna bested an invoker in battle and made her an apprentice, purifying a set of such armor in process. This set is sometimes called the Thorns set, as it focuses on Thorns attribute. As of patch 2.3.0, Smart Loot only drops it for Crusaders, even though technically it can be used by any class.