How to Play Genestealer Cults in Warhammer 40,000 11th Edition

Read this section first, because Cult Ambush is usually described as a free resurrection mechanic and it is nothing of the kind. It is a currency, and it runs out.

We can be unusually confident about every word here. Faction Pack v1.1 does not merely name the rule: its Rules Updates section reprints Cult Ambush in its entirety under ARMY RULES, including the full cost table. Nothing on this page is second-hand.

You start with Resurgence points. If your Army Faction is GENESTEALER CULTS you begin the battle with a pool that scales with battle size: 6 at Incursion, 10 at Strike Force, 14 at Onslaught.

Bringing a unit back spends them. Each time a unit from your army is destroyed, if every model in it excluding CHARACTER models has this ability, you may spend the listed cost for that unit's Starting Strength, not counting attached characters. The published prices are:

If you spend, two things happen. An identical new unit joins your army in Cult Ambush, at Starting Strength, with all wounds remaining and any [ONE SHOT] weapons treated as unfired. And you place one Cult Ambush marker anywhere on the battlefield more than 8 inches horizontally from all enemy units; if that is impossible, no marker is placed.

Now look at that table as a spending decision, because that is what it is. Ten Neophyte Hybrids cost 3 points. Ten Aberrants cost 8. At Strike Force you have ten points for the whole game. You can bring a Neophyte block back three times, or you can bring an Aberrant block back once and have two points left. Which unit you allow to die is a resource decision, and it is the decision that separates good Cult players from ones who merely have a lot of models.

Cult Ambush is a type of Strategic Reserves, with three differences worth memorising. Units in it cannot be targeted with Rapid Ingress. They can be set up from a marker as described below, or by the ordinary Strategic Reserves rules in a later turn. And they are not automatically destroyed at the end of the third battle round, which is the exemption that makes late-game returns possible at all.

The markers. Use a circular 32mm marker. If an enemy model, excluding AIRCRAFT, ends any kind of move within 8 inches of one of your markers, that marker is removed. At the end of your opponent's next Movement phase, for each of your markers still standing, you may select one unit in Cult Ambush to make an ingress move: one model in base contact with the marker, every other model wholly within 3 inches, then the marker is removed. Units in Cult Ambush can ingress in the first battle round.

Four clarifications the pack answers directly, because all four come up in real games:

• You do not have to remove unused markers at the end of your opponent's next Movement phase.
• If you have no units in Cult Ambush, you still do not have to remove remaining markers.
• An opponent's restriction on where your Reserves may arrive, such as an Infiltrator Squad's Omni-scramblers, does apply when you set up using Cult Ambush.
• A unit set up using Cult Ambush without a marker can still be targeted with the Tunnel Crawlers stratagem.

What our previous guide got wrong. It told you that a destroyed Cult unit had "a strong chance (near-automatic for your cheap Battleline hybrids, a roll for everyone else)" of returning. There is no roll anywhere in this rule, and nothing is automatic. It also placed markers at 9 inches, and removed them at 9 inches. Version 1.1 moved every one of those numbers to 8, and did so across the whole faction: the army rule, Evasive Vanguard, Along Shadowed Trails, Rapid Feint, In the Shadow of Iron, Regimental Reinforcements, Prowling Agitant, the Acolyte Iconward's Summon the Cult, the Sanctus's Creeping Shadow and the Reductus Saboteur's Planted Explosives.

In 11th edition you spend a Detachment Points (DP) budget rather than picking one detachment. The budget scales with game size: roughly 2 DP at 1,000 points (Incursion) and 3 DP at 2,000 points (Strike Force). The Munitorum Field Manual points at the Warhammer 40,000 app for exact figures, and we do not quote a figure for Onslaught because no first-party document we read states one.

The Genestealer Cults spread is bottom-heavy, with three cheap specialists, a wide 2 DP middle, and one detachment that eats the entire budget:

• 3 DP: Host of Ascension.
• 2 DP: Biosanctic Broodsurge, Brood Brothers Auxilia, Final Day, Outlander Claw, Xenocreed Congregation.
• 1 DP: Heroes of the Uprising, Purestrain Broodswarm, Xenocult Masses.

Nine detachments are legal, and we can show it in two independent directions. The pack prints four in full: Heroes of the Uprising (page 2), Purestrain Broodswarm (page 3), Xenocult Masses (page 4) and Final Day (pages 5 and 6). Its Rules Updates section amends five more by name: Biosanctic Broodsurge, Brood Brothers Auxilia, Host of Ascension, Outlander Claw and Xenocreed Congregation. Four plus five is exactly the nine the Munitorum Field Manual lists and exactly the nine the community mirror's own index lists, so nothing is unaccounted for either way.

No Genestealer Cults DP cost is contested. That is worth stating plainly, because our own earlier warnings said the opposite: they told you community reports disagreed over whether Heroes of the Uprising cost 1 DP or 2 DP. It costs 1 DP. The Munitorum Field Manual v1.3 and the mirror's index agree on all nine values, and the Munitorum Field Manual prints no increase or decrease marker on any of them.

Three detachments you may see elsewhere are not on this list. Cult Unveiled, Genespawn Onslaught and Infestation Swarm belong to Boarding Actions, a different game mode, and are not part of the matched-play nine.

Now the constraint that actually shapes list-building, and for this faction it is real rather than theoretical. The next section is about that.

Most factions in this programme have no illegal pairing at all. The Genestealer Cults have two, because four of the nine detachments carry a Unique Tag and the tags come in two matching pairs.

• PURESTRAIN sits on Purestrain Broodswarm (1 DP) and Biosanctic Broodsurge (2 DP).
• HOSTS sits on Xenocult Masses (1 DP) and Host of Ascension (3 DP).

A Unique Tag stops you taking two detachments that share it. So:

[Purestrain Broodswarm](/40k/armies/genestealer-cults/detachments/purestrain-broodswarm) plus [Biosanctic Broodsurge](/40k/armies/genestealer-cults/detachments/biosanctic-broodsurge) is ILLEGAL, and it costs exactly 3 DP. That is the whole Strike Force budget landing perfectly on the one army the rules forbid. It is also the army a Genestealer-loving player will build first, because those are the faction's two Genestealer-forward detachments. It gets its own page.

[Xenocult Masses](/40k/armies/genestealer-cults/detachments/xenocult-masses) plus [Host of Ascension](/40k/armies/genestealer-cults/detachments/host-of-ascension) is also illegal, but at 1 DP plus 3 DP it is already out of a Strike Force budget, so at that battle size the tag never has to do any work. We say both halves rather than only the tidier one.

Here is why this is harder than it sounds: the names actively mislead. Look at which detachments carry which tag and which names tell you so.

• Biosanctic Broodsurge carries PURESTRAIN and has nothing in its name to say so.
• Xenocult Masses carries HOSTS and has nothing in its name to say so.
• Purestrain Broodswarm carries PURESTRAIN and does say so.
• Host of Ascension carries HOSTS and does say so.

A player checking names rather than tag lines gets two of four right by accident and two wrong, and the two they get wrong are the two that produce an illegal army. There is a second false signal on top of that. Purestrain Broodswarm, Biosanctic Broodsurge and Brood Brothers Auxilia all share the word Brood, and that stem predicts nothing at all: the first two are the illegal pair, and the first and third are the pairing we recommend most.

And the inverse mistake is just as common. Purestrain Broodswarm plus Xenocult Masses is legal even though both carry a Unique Tag, because they carry different tags. Carrying a tag is not the same as sharing one. That collision also gets its own page, because ruling out a good army is a mistake you never find out you made.

The rule to carry away: check the tag line, not the name. In this faction the tag line is the only thing that decides legality.

How we know. The pack states two of the four tags in words inside their own detachment rules blocks, on pages 3 and 4, and the word "tag" occurs exactly twice across all eleven pages. We checked attribution by geometry rather than by reading order: each of those pages carries a "UNIQUE" banner above its own heading, and page 2, which carries Heroes of the Uprising, has no such banner at all, so the banner belongs to the detachment below it. We also checked that each tag sentence sits in the same left-hand column as its detachment rule rather than bleeding across from the stratagem column. The other two tags come from the Munitorum Field Manual v1.3, read with a parser validated the same day in both directions: run against the Astra Militarum page it correctly recovers eleven detachments and four tags, and run against the Grey Knights page it correctly recovers nine and none.

The menu is one whole-army identity at 3 DP, five mid-weight themes at 2 DP, and three cheap specialists at 1 DP.

Start here. Xenocult Masses (1 DP) is the right first pick. Hordes of the Faithful heals 3 wounds on any Neophyte Hybrids unit standing in a terrain area during your Command phase, which on a block of one-wound models means models coming back for free, every turn, for doing the thing you wanted to do anyway. It uses the cheapest models you will buy, it costs a single Detachment Point, and its units are the cheapest in the faction to bring back with the army rule.

If you want one detachment to be your whole army. Host of Ascension (3 DP) is the faction's big commitment. A Perfect Ambush gives every Genestealer Cults unit set up as Reinforcements [SUSTAINED HITS 1] and [IGNORES COVER] until the end of your next Fight phase. Since Cult Ambush is putting units into reserves and bringing them back all game, that rule is firing constantly, which is why it costs the entire budget.

If you like Genestealers. Purestrain Broodswarm (1 DP) lets unengaged Purestrain Genestealer units walk off the table into strategic reserves at the end of your opponent's Fight phase, so a brood that has finished killing something leaves before the counter-attack.

If you like a melee hammer. Biosanctic Broodsurge (2 DP) gives Aberrants, Biophagus and Purestrain Genestealers +1 to Charge rolls and +1 Attack on melee weapons on any turn they charged.

If you like assassins. Heroes of the Uprising (1 DP) gives the Kelermorph, Locus, Reductus Saboteur and Sanctus the KILLER keyword and re-rolls of 1 to hit and to wound, with no condition attached.

If you want firepower. Brood Brothers Auxilia (2 DP) imports Astra Militarum units up to a points cap and makes anything your Guard shot easier for your Cult to hit.

If you like characters leading hordes. Xenocreed Congregation (2 DP) re-rolls Advance and Charge rolls for any hybrid squad a character is leading, and gives a Magus, Primus or Acolyte Iconward Feel No Pain 3+ while leading one.

If you like vehicles. Outlander Claw (2 DP) adds +1 Objective Control to your mounted and vehicle models and makes objectives held near Atalan Jackals sticky.

If you want Tyranids in your list. Final Day (2 DP) is the crossover detachment, and it is a real matched-play option rather than a curiosity. It lets you include Tyranids Vanguard Invader units up to a points cap and drains your own cultists to heal them.

Our recommended first 2,000-point army is Purestrain Broodswarm plus Brood Brothers Auxilia, the most cohesive is Xenocult Masses plus Xenocreed Congregation, and the one most people wrongly rule out is Purestrain Broodswarm plus Xenocult Masses.

One piece of arithmetic worth having: at 3 DP there are eighteen legal multi-detachment armies. Fourteen pair a 1 DP detachment with a 2 DP detachment (fifteen such pairs exist and one of them is illegal), three pair two 1 DP detachments and leave a point unspent, and exactly one three-detachment army exists: Heroes of the Uprising plus Purestrain Broodswarm plus Xenocult Masses.

Three habits separate a Genestealer Cults player who wins from one who simply owns a lot of models.

Decide in advance which units you are willing to lose. The Resurgence table is a price list, and at Strike Force you have ten points. Losing ten Neophytes costs 3 and losing ten Aberrants costs 8. That means a Neophyte block is genuinely expendable and an Aberrant block is genuinely not, and the difference should show in how you deploy them. The commonest way to lose with this army is to spend the whole pool in the first two battle rounds on units you did not need back.

Protect markers by threatening, not by hiding. A marker dies when any enemy model ends a move within 8 inches of it. That means your opponent can simply walk a cheap unit at your markers all game, and against a passive Cult player it works. The counter is to make that walk expensive: Biosanctic Broodsurge's Evasive Vanguard and Outlander Claw's Along Shadowed Trails both let you move a threatened marker rather than lose it, and Brood Brothers Auxilia's In the Shadow of Iron re-anchors one to a tank. If your detachment has no marker-saving tool, place markers where a screening unit has to expose itself to reach them.

Battle-shock is what actually loses you objectives. A battle-shocked unit has Objective Control 0, so a Cult horde standing on an objective while battle-shocked is holding nothing at all. This is why Xenocreed Congregation's Gene-sire's Reliquant at 5 points is the best-value enhancement in the faction, and why Heroes of the Uprising's Living Up to Legend, which un-shocks every visible friendly unit within 12 inches, is a scoring stratagem wearing an assassin's coat.

Our catalog holds three Genestealer Cults products, and we will not pretend otherwise or point you at approximate kits.

[Combat Patrol: Genestealer Cults](/40k/boxes/combat-patrol-genestealer-cults) is the entry box and the right first purchase for almost everyone. Open the box page for its current contents and price rather than trusting a description here; we hold no curated contents for it, so we do not claim any.

[Battleforce: Genestealer Cults](/40k/boxes/battleforce-genestealer-cults) is the larger seasonal bundle. It appears and disappears between seasonal runs, so sealed stock thins out; the box page tracks price rather than assuming availability.

[Kill Team: Brood Brothers](/40k/boxes/kill-team-brood-brothers) is a genuine Genestealer Cults product but it is a Kill Team box, not a Warhammer 40,000 unit box, and no Warhammer 40,000 datasheet is called "Brood Brothers". It is not a substitute for the Astra Militarum units the Brood Brothers Auxilia detachment actually imports.

Two warnings before you shop.

The Tectonic Fragdrill is a Legends datasheet. Faction Pack v1.1 prints it in full on pages 10 and 11 under a WARHAMMER LEGENDS banner. Legends datasheets are not part of the matched-play game. It is an easy trap to fall into here because its Underground Egress ability interacts directly with Cult Ambush markers, so it reads like a normal Cult option in the middle of a Cult document. It is not one.

Do not buy a box called "Sanctus" expecting a Genestealer Cults assassin. The Genestealer Cults Sanctus is a character datasheet. There is also a 2019 Adepta Sororitas launch box named Warhammer 40,000: Sanctus, which is a Sisters of Battle product with no Genestealer Cults content whatsoever. The names collide exactly and the products have nothing in common.

New to the hobby entirely? Read the best 40k army for beginners first. Genestealer Cults reward experience, because the army rule is a resource-management puzzle rather than a stat line.