The Eldar may venture into the Hive to recover fallen Eldar, or more specifically, Spiritstones, psychoreceptive crystals that contain the souls of tile dead Eldar preserving them from the Great Enemy, Slaanesh. These may survive for a considerable time, especially if they are not noticed by those who dwell within the Hive. To recover these lost souls is important to the Eldar, both to safeguard the enclosed spirit from being consumed and to enhance the Craftworld's Infinity Circuit with their presence.