Editing Warhammer 40,000/9th Edition Tactics/Thousand Sons (section)

===Detachment Rules===
In order to be Battle-forged, you can't mix two different {{W40Kkeyword|<Great Cult>}}s in the same detachment (models without the keyword at all can't mess this up, naturally).  A Battle-forged {{W40Kkeyword|Thousand Sons}} detachment gains these:

*'''Brotherhood of Sorcerers:'''
** All of your units gain +1 to their psychic tests.
** All of your {{W40kKeyword|ARCANA ASTARTES}} and {{W40kKeyword|TZAANGOR}} units gain a 5++ invulnerable save.
*** Note that {{W40kKeyword|ARCANA ASTARTES}} extends to all of your legion units, such as Rhinos, Vindicators, Helbrutes, and even the FW units. This basically means all of your units have 5++ or better, with the exception of Cultists and Chaos Spawn.
*'''Cults of the Legion:''' Every {{W40kKeyword|THOUSAND SONS}} detachment can be assigned a cult. Every unit with the {{W40kKeyword|<GREAT CULT>}} keyword changes it to the appropriate Cult name, which in practice is your non-{{W40kKeyword|TZAANGOR}} non-{{W40kKeyword|CULTISTS}} units (yep, your mindless Chaos Spawns are cultists in the Cult, but your human Cultists AREN'T cultists in the Cult, nor are your anthropomorphic bird cultists! Tzeentch loves mind fucks.), and are not a named character. Every {{W40kKeyword|thousand sons <GREAT CULT> PSYKER}} automatically knows the cult's psychic power, in addition to the other powers they know, and every {{W40kKeyword|Thousand Sons <GREAT CULT> character}} can gain the cult's warlord trait when they would gain a warlord trait.  The relics are a bit different: if your warlord is either Magnus or from a given cult, {{W40kKeyword|thousand sons <GREAT CULT> character}}s gain access to their relics, which means if you e.g. take a Cult of Magic detachment and a Cult of Duplicity detachment, a Cult of Magic warlord only enables the Cult of Magic relic; throwing in Magnus in a third detachment as your warlord would unlock both cult's relics, while making Ahriman the warlord would unlock ''neither'', making him the worst warlord you can field.
** That said, it's not like you can't take Magnus or Ahriman in any cult, as they have rules circumventing the restrictions of taking a cult. It's just that they gain nothing from using them, and Ahriman blocks relic access.
*'''Jealous Tyrant''': Restriction that stops you from spamming Daemon Princes. You may only include one daemon prince per Thousand Sons detachment.
*'''Legion Command:''' So all your unnamed sorcerers of any stripe (Sorcerers in power and termie armour, Exalted Sorcerers, Aspiring Sorcerers, and Scarab Occult Sorcerers) can all buy up to one of the upgrades available to them (listed in their descriptions). You can only take each one of these upgrades once per army and they cost points/power level in order to grab them.  This works like relics: having a single {{W40Kkeyword|Thousand Sons}} detachment legalises these upgrades for all valid recipients in your army, not just in the qualifying detachment.
*'''Mere Servants:''' Restrictions on the units that you can bring in your army list, same as Nurgle's lot.
** You're not allowed to take more {{W40kKeyword|THOUSAND SONS CULTISTS}} units than {{W40kKeyword|RUBRIC MARINES}} and {{W40kKeyword|SCARAB OCCULT TERMINATORS}} in each of your {{W40kKeyword|THOUSAND SONS}} detachments. 
** You're not allowed to take more {{W40kKeyword|BRAY}} units than {{W40kKeyword|RUBRIC MARINES}} and {{W40kKeyword|SCARAB OCCULT TERMINATORS}} in each of your {{W40kKeyword|THOUSAND SONS}} detachments. Which is hilarious when you realise that the new combat patrol box will come with one scarab occult terminator unit and 20!!! Tzaangors. Guess you've gotta buy another box of rubrics, if you wanna use 2 squads of 10 tzaangors. [[Games Workshop|Just as planned...]] 
*'''Objective Secured:''' Given to Tzaangors, Rubrics, and Scarab Occult Terminators, even though they're Elites.