Slave Overseers and Warrendrills that by and large play the biggest roll in giving the cult room to house it's truly staggering numbers. They often work in concert with the Warrendrills crumbling solid bedrock or girders, bulkheads and steel from the lowest levels of a Hive. The Slave Overseer will then encourage the lowest ranks of the cult to clear away the resultant rubble and scrap with both word and whip. The Flatbed of the Warrendrills serve as perfect platforms for this task and should the warrens ever be breached Cult Vermin will swarm the Warrendrills to press them into front line service.