Genestealer Cults: Biosanctic Broodsurge Detachment Guide (11th Edition)

Three entries in this detachment were amended by name in Faction Pack v1.1's Rules Updates section, and one of them changes how the detachment plays.

Stimulated Bio-surge's Effect section was rewritten to a flat +2 to charge rolls. Stack that with the detachment rule's own +1 and a 9 inch charge stops being a gamble and becomes a plan.

Evasive Vanguard's When and Effect sections both changed from 9 inches to 8, in line with the faction-wide sweep. It now triggers when an enemy ends a move within 8 inches of one of your Cult Ambush markers, and relocates that marker more than 8 inches horizontally from all enemy units.

Predatory Instincts was rewritten in full. It now reads: ABOMINANT, BIOPHAGUS or PATRIARCH model only; models in the bearer's unit have the Infiltrators ability; and you can target this unit with the Heroic Intervention stratagem regardless of any other uses of that stratagem this phase, at -1 CP, without preventing other uses on other units.

If you built a Biosanctic Broodsurge list before 22 July 2026, the second and third of those are worth re-reading. The Infiltrators grant in particular is the difference between a melee brick that spends two turns walking and one that starts in your opponent's half.

Six stratagems. Five cost 1 CP and all of them are 1 CP, which for a 2 DP detachment is generous.

Stimulated Bio-surge gives a qualifying unit that has not declared a charge +2 to charge rolls. Rewritten in this pack, as above.

Evasive Vanguard saves a threatened Cult Ambush marker by moving it, in any phase, just after an enemy ends a move within 8 inches of it and before the markers are removed. This is the counter to the standard anti-Cult play of walking a cheap unit at your markers, and having it is a real reason to pick this detachment.

Gene-twisted Muscle adds 1 to Wound rolls against MONSTER or VEHICLE targets for a qualifying unit that has not fought. Aberrants and Genestealers are excellent against infantry and mediocre against armour, so this is the detachment patching its own weakness.

Hyper-metabolic Vigour makes Pile-in and Consolidation moves 6 inches instead of 3, and removes the requirement to end closer to the nearest enemy model provided you end as close as possible to the nearest enemy unit. That second clause is the useful half: it is how a melee brick walks out of one fight and onto an objective, which matters in a Take and Hold detachment.

Saintly Paroxysm fires just after an enemy destroys one of your Genestealer Cults CHARACTER models: roll a D6, and on a 2+ that enemy suffers D3 mortal wounds, or 2D3 if the destroyed character was an ABOMINANT or PATRIARCH. You may use it on the model even though it was just destroyed.

Bio-horror Revelation makes each enemy unit within 9 inches of your target unit take a Leadership test at -1 when selected to shoot, and on a failure subtract 1 from its Hit rolls against your unit. Note this one still reads 9 inches: the pack's 9-to-8 sweep hit Cult Ambush marker distances and reactive moves, not every number printed in the faction.

Four enhancements, all restricted to ABOMINANT, BIOPHAGUS or PATRIARCH models, with Biomorph Adaptation narrower still.

Biomorph Adaptation (25 pts) is ABOMINANT or PATRIARCH only and improves the bearer's melee Armour Penetration and Damage by 1. The most straightforward damage enhancement in the faction.

Predatory Instincts (20 pts) grants the bearer's unit Infiltrators and a discounted, non-blocking Heroic Intervention. Rewritten in this pack. The Infiltrators half is why you take it.

Alien Majesty (15 pts) subtracts 1 from the Objective Control of models in any enemy unit within Engagement Range of the bearer's unit, to a minimum of 1. A scoring enhancement on a Take and Hold detachment, which fits better than it first looks: your hammer is usually standing on top of a contested objective anyway.

Mutagenic Regeneration (10 pts) regains 1 lost wound on one model in the bearer's unit each Command phase. Cheapest here, and it keeps an Aberrant block alive across the several turns it needs to reach anything.

Aberrants are the heaviest of the three named datasheets and the reason to take this detachment. Know the other side of that: they are the most expensive unit in the faction to bring back with the army rule, at 4 Resurgence points for five models and 8 for ten. At Strike Force you start with ten points, so an Aberrant block that dies twice has eaten almost your entire Cult Ambush budget. Deploy them like something you cannot replace, because very nearly you cannot.

Purestrain Genestealers are named by the detachment rule and by four of the six stratagems. Note the tag consequence: this detachment carries PURESTRAIN, so if you want a Genestealer-themed army you take this detachment or Purestrain Broodswarm, never both.

Biophagus. The third named datasheet and a legal carrier of every enhancement here. It moved from Leader to Support in this pack's Core Abilities change, and the pack also rewrote its Unit Composition wargear to autopistol, chemical vials, injector goad and alchemicus familiar.

Abominant. The other Biomorph Adaptation carrier, and the model that upgrades Saintly Paroxysm from D3 to 2D3 mortal wounds when it dies.

We link no box for any of them. Our catalog holds no Genestealer Cults single-unit box at all.

Pairing. At 2 DP this pairs with a 1 DP detachment for exactly 3 DP, but only two of the three are available to you: Xenocult Masses and Heroes of the Uprising. Purestrain Broodswarm shares this detachment's PURESTRAIN tag and is illegal alongside it. Xenocult Masses is the better of the two: a horde that holds ground plus a hammer that removes whatever contests it, and the tags differ so nothing is blocked.