The inscrutable and unknowable Cephalyx lurk below western Immoren capturing humans and transforming them into mindless drudges with machinery, drugs, and horrible surgery. Cephalyx exert terrifying control over the minds of others even before enslaving them. The Cephalyx have concluded some unholy alliance with Lord Toruk, and now the mind slavers' drudges march to war alongside Cryxian thralls and helljacks.

The Cephalyx Slaver and Drudge Mind Slaves come in a box set of 6 (PIP 42005), and players may add up to two additional blisters of Drudge Mind Slaves (PIP 42006) to create a full unit of ten models. A player may have up to two units for every warcaster in his Cryx army. Additionally, allies may be used in certain mercenary contract armies.

From what I can gleam from their abilities in the Monsternomicon the Caphalyx is going to have several Spell Actions as per Grey Lords as well as possibly weapon master for his Prothetic blades as well as five damage points.  The Drudges are going to mostlikt have DEF 13 ARM 16 or 17, two weapons, decent POW + STR and are going to be Tough.  Tough it looks as though if the Cephalyx is killed the Drudges will loose alot of their punch.