We can't find any source for this item (quests reward, drop, etc). It's highly probable this item is not obtainable right now. It seems that the New Guantes de trabajo de sombras del archimago is obtainable.
Looted at 590+ GS by Articulon the Unshackled at Nihilo Visage (Not the one in the ori vein - looted from the one by high priest)
dropped by Articulon by high priest