[Malfeasance Acquisition: We’ve heard player feedback concerning the spawn rates of the Ascendant Primeval Servitor, and we are making adjustments to how frequently it will appear.

During week three of the curse cycle, also known as a full-curse week, the Ascendant Primeval Servitor will have almost the same chance to spawn as any other Primeval. We will also be increasing the chance for the boss to spawn during lesser-curse weeks, but it will still be lower than during a full-curse week.

For full transparency, since the Ascendant Primeval Servitor spawn rate will increase significantly when these changes are released, we are tweaking how ship and Sparrow rewards drop from the boss. Vanity items are no longer guaranteed drops for subsequent boss kills after you earn the quest, instead the vanity items will now only have a chance to drop.] (https://www.bungie.net/en/Explore/Detail/News/47303)