Purestrain Broodswarm — Genestealer Cults Detachment Guide

The Broodswarm rule lets your Purestrain Genestealers cycle in and out of reserves. Reporting describes an Enemy Within-style rule where unengaged Purestrain units can be placed into strategic reserves at the end of your opponent's Fight phase — so after they've mauled something, they slip away and threaten a new flank next turn. Combined with the army's ambush, this makes purestrains maddening to pin down and lets you repeatedly pick favourable fights. Confirm the exact timing and conditions in the Faction Pack; the loop is the whole appeal.

The detachment's stratagems support the elusive-predator theme. Reporting names a Mark of the Star Children-style stratagem that boosts a few units' toughness, saves, and melee output (making a key brood a real threat), and a Crawling Horror-style stratagem that lets Genestealers hide in terrain until they strike. Use the buff on the brood you're committing to a charge; use the concealment to bait the enemy forward before you pounce. Save resources for the turn a strike genuinely swings the game. Check current CP costs in-app.

Enhancements here amplify your purestrain broods or the characters that lead them — added lethality, durability, or mobility to make the hit-and-run loop hurt more. Prioritise whatever keeps your key brood hitting hard on the charge, since the detachment's value is concentrated in those melee spikes. As with all GSC detachments, exact enhancement names and effects are set in the Faction Pack — verify before planning around a specific number.

Purestrain Genestealers are the entire point — bring them in numbers and lead them where the detachment rule and stratagems demand. A Patriarch is the natural centrepiece, boosting and accompanying the brood. Support with cheap hybrids to screen, hold objectives, and control the board so your purestrains are free to pick their fights. Everything is in service of getting Genestealers into combat on your terms and pulling them out before they're punished.

Take Purestrain Broodswarm when you want a fast, elusive melee army that dictates every fight, or when you simply love the Genestealer models. It's a hit-and-run specialist, so it rewards disciplined sequencing — dive out, strike, recede — over brute commitment. It DP-pairs well with a horde or character detachment that provides board control and objective-holders while the purestrains do the killing. Confirm its DP cost in the app before building.