The Babylonian Thieves Guild is a large and vibrant association of thieves prominent in Babylon. When the Vizier's forces, the Scythians, arrived to conquer the Persian capital, the guild fought alongside the city guard for the first time in history, having a common enemy. When they were eventually defeated by the overwhelming forces, the Vizier (now calling himself Zurvan) sought them as a potentially powerful ally and captured as many as they could. When they did not swear allegiance to Zurvan, they were corrupted by the Sands of Time and their free will was stripped, turning them into sand creatures known as Illusions.[1]
Along with the rest of the capital, the Vizier's hold over the guild ended when the Prince defeats and kills him with the Dagger of Time.[2]