Screams of the Dammed - 40 Soul Essence - Temporarily reduces morale of all enemy units. Piercing Vision - 40 Soul Essence - temporarily grants detection to single squad or vehicle.
Soul Cage - Allows units: Ravagers and Dais of Destruction (requires relic). Wych-Cult Arena - Contains research to improve commander units, allows units: wych squad, talos. Haemonculus' Laboratory - contains research to improve infantry units. Slave Chamber - increases pop cap, increases reinforcement speed, upgraded to demoralize enemies, or output soul essence for harvesting. Must be upgraded to achieve tier 2, and once again to achieve tier 3. Primary structure of the Dark Eldar that produces Tortured Slaves, Mandrakes and the Haemonculus.
