Editing Warhammer 40,000/9th Edition Tactics/Dark Eldar (section)

===Detachment abilities===
Because they're akin to three armies in one, Drukhari have several additional rules that affect how you build your detachments, either souped, separate or all-in-one. Going step-by-step, you have to:
#Make a "battle forged" detachment. That is, one that follows any of the Force Organization Charts. But in the Dark Eldar's case, it also means all {{W40kKeyword|kabal}} units in the detachment are from the same kabal, all {{W40kKeyword|wych cult}} units are from the same wych cult, and all {{W40kKeyword|Haemonculus coven}} units are from the same haemonculus coven.
#'''Weakling Kin''': You cannot include Drukhari and Non-Drukhari Aeldari units in the same detachment unless they all have the {{W40kKeyword|Ynnari}} keyword. So no splashing in Yvvraine for some psychic defense: you either are a {{W40kKeyword|druhkari}} detachment or you are not, and you stop reading here.
#Now that you have decided you are a Dark Eldar detachment, one that is battle forged, then you have to nominate what kind of detachment it is:
#*{{W40kKeyword|kabal}} units in a '''Kabal Detachment''' gain their kabal's Obsession, and have access to their relic, WT, and stratagem. It doesn't say anything about all units needing to be Kabal units, meaning ''you can bring wych and coven units inside a kabal detachment'' and it WON'T BLOCK the Kabal from getting its Obsession. But those wych and coven units wouldn't get their obsessions, WT, relics or stratagems, not in a Kabal detachment.
#*{{W40kKeyword|wych cult}} units in a '''Wych Cult Detachment''' gain their cult's Obsession, and have access to their relic, WT, and stratagem. The same restrictions and benefits apply here.
#*{{W40kKeyword|haemonculus coven}} units in a '''Haemonculus Coven Detachment''' gain their coven's Obsession, and have access to their relic, WT, and stratagem. The same restrictions and benefits apply here.
#**Since you don't actually need a Haemonculus as an HQ to nominate a detachment as a haemonculus coven (same for Kabal and Wych Detachments), you can bring Drazhar at the head of a "Haemonculus Detachment", without having to actually buy any Haemonculi, yet Wracks in that detachment would still get their trait and coven stratagem.
#*If your force has one Archon as the warlord, and also at least one Succubus, one Haemonculus, one unit of Kabalite warriors, one unit of Wyches, and one unit of Wracks, then instead of nominating a detachment into either a Kabal, Wych Cult or Haemonculus detachment, that detachment can be a '''Realspace Raid detachment''':
#**'''Realspace Raid''': A Realspace Raid with an Archon designated as the Warlord, a Succubus, a Haemonculus, and at least one unit of Wracks, Warriors, and Wyches will grant all {{W40kKeyword|Kabal}}, {{W40kKeyword|Wych Cult}}, & {{W40kKeyword|Haemonculus Coven}} units (but not {{W40kKeyword|Blades For Hire}}) in the detachment their corresponding Drukhari Obsession. The units in that detachment will also be able to use Wych Cult and Haemonculus Coven relics despite the Warlord not being from either of those factions, and the Archon's Overlord ability's benefits will be extended to all {{W40kKeyword|Core}} units in the detachment. 
#'''Raiding Forces''': When fielding multiple detachments, if ''every'' detachment in your army is a {{W40Kkeyword|Drukhari}} Patrol Detachment, then they don't cost CP to field: their CP cost and Command Benefits (for your Warlord being in one) both become 0.
#'''Arks of Omen''': As per the rules in ''Arks of Omen: Grand Tournament Mission Pack'', you can take one flexible Arks of Omen Detachment and nominate it as either {{W40kKeyword|Kabal}}, {{W40kKeyword|Wych Cult}}, or {{W40kKeyword|Haemonculus Coven}} Detachment. Then, you might also take one Allied Patrol Detachment of a different type, so you can have a Kabal + Coven, Kabal + Cult, or Cult + Coven combo. Units in their respective Detachments gain Obsessions as normal.