Subversion Assets: The 11th-Edition Space Marines Stealth Detachment

The detachment rule turns your Phobos and Scout Squad units into spotters. In your Shooting phase they can mark a visible enemy unit as "detected," feeding your wider army's targeting under 11th edition's new detection/Hidden stealth system. In practice it is army-wide target-marking driven by your covert screen — the cheap units up front make the biggest enemy threat easier for the rest of your list to engage. The new detection mechanic is worded slightly differently across sources, so treat the exact interaction as paraphrased and check the pack.

The officially previewed stratagem is Strike from the Shadows: after a Phobos or Scout unit shoots, it does not stop being Hidden — normally shooting reveals a concealed unit, but this lets it fire and stay hidden. Use it to let Eliminators snipe enemy characters turn after turn from concealment, or to keep a scoring unit safe after it chips a target.

The faction pack contains further stratagems (community trackers list defensive concealment and action-while-shooting tricks), but their exact wording isn't officially confirmed — lean on Strike from the Shadows and verify the rest against the pack.

The confirmed enhancement is Shroud Field, which gives a Phobos character both Lone Operative and Stealth — nearly impossible to target except at close range, and harder to hit when you can. Put it on a Phobos Captain or Lieutenant sitting on a key objective and it becomes extremely hard to shift. The pack lists additional enhancements (including a counter-stealth, hit-the-hidden option on trackers) that aren't officially confirmed yet.

• Scout Squad — cheap, flexible objective-holders that carry the detachment keyword and love staying Hidden while they score.
• Infiltrators — a deep-strike-denial bubble and midfield screen; ideal spotters for the marking rule.
• Eliminators — ranged specialists who shoot and stay Hidden via Strike from the Shadows, sniping characters from concealment.
• Incursors / Reivers — Phobos board control that benefits from the detection and Hidden tools.
• Phobos character (Captain/Lieutenant in Phobos) — the best Shroud Field carrier and the anchor for your Phobos units.

At 1 DP, Subversion Assets is a support layer, not a whole army. Bolt it onto a 2-DP core when you want backfield denial, durable scoring, and target-marking without diluting your main detachment's focus. It suits lists already leaning on Infiltrators, Eliminators and Scouts, and rewards a grindy, secondary-scoring, objective-denial game rather than an aggressive alpha strike.

Sample gameplan: deploy Infiltrators and Scouts to deny deep strike and screen no-man's-land, then push Scouts onto forward objectives. Each Shooting phase, mark the biggest enemy threat with Nowhere to Hide so your army can focus it, while Eliminators snipe characters and stay Hidden. Anchor a key objective with a Shroud Field character and win on attrition and points.