Brood Brothers
(Rule)Description: Several GENESTEALER CULTS units also have the BROOD BROTHERS keyword. These units can be included in a GENESTEALER CULTS Detachment without preventing other units in that Detachment from gaining a Cult Creed. Note, however, that BROOD BROTHERS units do not themselves benefit from any Cult Creed.
In addition, to represent Astra Militarum forces that have been subverted, you can include ASTRA MILITARUM units and GENESTEALER CULTS units in the same matched play army, even though these units do not have any Faction keywords in common. In such cases, ignore the ASTRA MILITARUM units when choosing your army's Faction.
If your army is Battle-forged, you can only include one ASTRA MILITARUM Detachment (one in which every unit has the ASTRA MILITARUM keyword) in your army for each GENESTEALER CULTS Detachment in that army. You cannot include ASTRA MILITARUM named characters in these Detachments, and these Detachments cannot be Specialist Detachments. These ASTRA MILITARUM Detachments are then known as BROOD BROTHERS Detachments, and every unit in them that has the or MILITARUM TEMPESTUS keyword must replace it in every instance on its datasheet with BROOD BROTHERS (if a unit does not have either of these keywords, it simply gains the BROOD BROTHERS keyword).
BROOD BROTHERS Detachments do not gain any of the Detachment abilities listed in Codex: Astra Militarum, such as Regimental Doctrines, nor can they use any regiment-specific Stratagems, Orders etc. Furthermore, INFANTRY models in BROOD BROTHERS Detachments increase their Leadership characteristic by 1 and they gain the Unquestioning Loyalty ability. Units in BROOD BROTHERS Detachments do not gain the Cult Ambush ability. Your Warlord cannot be from a BROOD BROTHERS Detachment, and you cannot give any Relics to BROOD BROTHERS CHARACTERS. In addition, the Command Benefits of all BROOD BROTHERS Detachments included in your army in this way are halved (rounding up). This reflects that such Detachments are not a Genestealer Cult's primary fighting force, and the acquisition of such military assets is costly in terms of resource. The command benefits of Auxiliary Support Detachments are unaffected.
BROOD BROTHERS units that have the Voice of Command or Tank Orders abilities (see Codex: Astra Militarum) cannot issue orders to any unit that has the GENSTEALER CULTS Faction keyword, nor can they issue orders to units that they would not have been able to issue orders to before they gained the BROOD BROTHERS keyword (e.g. a BROOD BROTHERS COMPANY COMMANDER cannot issue orders to a BROOD BROTHERS OGRYN unit or to a BROOD BROTHERS TEMPESTUS SCIONS unit).
BROOD BROTHERS TAUROX PRIMES can only transport 10 BROOD BROTHERS OFFICIO PREFECTUS INFANTRY models or 10 INFANTRY models that replaced their MILITARUM TEMPESTUS keyword with BROOD BROTHERS.