Hone your Taken power and thin the Hive numbers by completing Vengeance side quests obtained from the Shaping Slab.
Eris is known as the avatar of vengeance within Hive broods, and you as her Knife. Sloane believes that if we hit the Hive we can break their focus and delay any further assaults against Eris' throne.
Strike the Hive while Eris and Sloane research how to utilize the hilt of Willbreaker.