TEXT: 1
  WARHAMMER 40,000 – CODEX: ADEPTUS MECHANICUS
   
  CODEX: ADEPTUS MECHANICUS
  Indomitus Version 1.1
  These documents collect amendments to the rules and present 
  our responses to players’ frequently asked questions. Often 
  these amendments are updates necessitated by new releases or 
  community feedback; these can be identified by the presence 
  of an asterisk before the page reference. At other times, these 
  amendments are errata designed to correct mistakes or add 
  clarity to a rule that is not as clear as it might be. 
  As they’re revised regularly, each of these documents has a 
  version number; where a version number has a letter, e.g. 1.1a, 
  this means it has had a local amendment, only in that language, 
  to clarify a translation issue or other minor correction. When 
  a document is revised, the version number will be incremented 
  and new updates will be highlighted in blue, while new errata 
  and FAQs will be highlighted in magenta. 
  DESIGNER’S NOTES
  WEAPON UPDATES
  Several weapon profiles were updated in the 2020 edition of 
  Codex: Space Marines. As a result, where those same weapons 
  appear in this publication, they are updated to match. We have 
  also updated the wording of certain weapons’ abilities that 
  would explode or inflict mortal wounds on hit rolls of 1, so that 
  they now only do so on unmodified hit rolls of 1. The weapons in 
  question, and the updated profiles for them, are found at the end 
  of this document, and should be changed wherever they appear in 
  this book.
  UPDATES & ERRATA
  *Page 79 – Sicarian Infiltrators, Taser goad, Abilities
  Change to read:
  ‘When resolving an attack made with this weapon, an 
  unmodified hit roll of 6 scores 2 additional hits.’
  *Page 80 – Corpuscarii Electro-Priests, electrostatic gauntlets 
  (shooting) and electrostatic gauntlets (melee), Abilities
  Change to read:
  ‘When resolving an attack made with this weapon, an 
  unmodified hit roll of 6 scores 2 additional hits.’
  *Page 81 – Sydonian Dragoons, Taser lance, Abilities
  Change to read:
  ‘When resolving an attack made with this weapon, an 
  unmodified hit roll of 6 scores 2 additional hits.’
  *Pages 81 and 90 – Radium jezzail, Abilities
  Change the first sentence to read:
  ‘Each time you select a target for this weapon, you can ignore the 
  Look Out, Sir rule.’
  *Page 83 – Onager Dunecrawler, Crawler
  Delete this ability.
  Page 83 – Onager Dunecrawler, Damage table
  Change the first value under ‘Remaining W’ to ‘6-11+’.
  *Pages 84-88 – Knight Errant, Knight Paladin, Knight Warden, 
  Knight Gallant, and Knight Crusader, Super Heavy Walker
  Change the ability to read:
  ‘This model is eligible to declare a charge in a turn in which 
  it Fell Back. Each time this model makes a Normal Move, 
  Advances or Falls Back, it can be moved across other models 
  (excluding Monster and Vehicle models) as if they were not there, 
  and when it does it can be moved within Engagement Range 
  of such models, but cannot finish its move within Engagement 
  Range of any of them.’
  Pages 84-88 – Knight Errant, Knight Paladin, Knight Warden, 
  Knight Gallant and Knight Crusader, Keywords
  Add ‘Imperial Knights’ to the Faction keywords line.
  Add ‘Questoris Class’ to the keywords line.
  Pages 84-87 and 91 – Knight Errant, Knight Paladin, 
  Knight Warden, Knight Gallant and Melee Weapons table, 
  reaper chainsword
  Change the Strength characteristic of this weapon to ‘+6’.
  Page 84 – Knight Errant, Power Rating
  Change to ‘22’
  Pages 85 and 86 – Knight Paladin and Knight Warden, 
  Power Rating
  Change to ‘23’
  Page 87 – Knight Gallant, Power Rating
  Change to ‘20’
  Page 87 – Knight Gallant, Profile line
  Change the Attacks characteristic to ‘5’
  Page 87 – Knight Gallant, Damage table
  Change the first value under ‘WS’ to ‘2+’.
  Change the second value under ‘WS’ to ‘3+’.
  Change the third value under ‘WS’ to ‘4+’.
  Page 88 – Knight Crusader, Power Rating
  Change to ‘25’
  *Page 89 – Electrostatic gauntlets (shooting), Abilities
  Change to read:
  ‘When resolving an attack made with this weapon, an 
  unmodified hit roll of 6 scores 2 additional hits.’
  
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  WARHAMMER 40,000 – CODEX: ADEPTUS MECHANICUS
  *Page 90 – Transuranic Arquebus, Abilities
  Change the second sentence to read:
  ‘Each time you select a target for this weapon, you can ignore the 
  Look Out, Sir rule.’
  *Page 91 – Electrostatic gauntlets (melee), taser lance and taser 
  goad, Abilities
  Change to read:
  ‘When resolving an attack made with this weapon, an 
  unmodified hit roll of 6 scores 2 additional hits.’
  Page 95 – Forge World Dogma, Graia: Refusal to Yield
  Change the first sentence of rules text to read:
  ‘Roll a D6 each time a model with this dogma is slain or flees – 
  on a 6 that model refuses to yield; either that model is not slain 
  (and has 1 wound remaining), or that model does not flee.’
  Page 96 – Stratagems, Scryerskull
  Change the last clause of the last sentence to read:
  ‘or, in your Shooting phase, shoot with an Adeptus Mechanicus 
  unit from your army without the penalties to your hit rolls from 
  the Dawn Raid, Low Visibility or Cover of Darkness rules.’
  *Page 97 – Stratagems, Acquisition at Any Cost
  Add the following sentence to the end:
  ‘This Stratagem can only be used once per turn.’
  *Page 97 – Rage of the Machines
  Change the second sentence to read:
  ‘Until the end of the phase, that Vehicle can ignore all penalties 
  for Advancing and firing an Assault weapon and for Advancing 
  and firing a cognis weapon.’
  Page 98 – Stratagems, Rotate Ion Shields
  Change the Command Point cost to ‘1CP/3CP’
  Change the rules text to read:
  ‘Use this Stratagem when an enemy unit targets an Imperial 
  Knights Vehicle unit from your army that has an invulnerable 
  save (this Stratagem costs 3 CPs if the targeted unit is a Dominus 
  Class unit, otherwise it costs 1 CP). Until the end of the phase, 
  the vehicle unit’s invulnerable save is improved by 1 (to a 
  maximum of 4+).’
  Page 98 – Stratagems, Clandestine Infiltration 
   Change the rules text to read: 
  ‘Use this Stratagem when you set up a Stygies VIII unit from your 
  army during deployment. At the start of the first battle round 
  but before the first turn begins, you can move that unit up to 9". 
  It cannot end this move within 9" of any enemy models. If both 
  players have units that can move before the first turn begins, the 
  player who is taking the first turn moves their units first. Each 
  unit can only be selected for this Stratagem once per battle.’
  Page 99 – Forge World Warlord Traits, Masterwork Bionics
  Change the title of this Warlord Trait to ‘Superior Bionics’.
  FAQs
  Q: A number of weapons (e.g. twin cognis autocannon) and other 
  rules (e.g. Protector Doctrina Imperative Stratagem) modify hit 
  rolls by more than -1 or +1. Given that hit rolls cannot be modified 
  by more than this, what effect do these rules have?
  A: While hit rolls and wounds rolls cannot be modified by more 
  than -1 or +1, this limit takes effect after all applicable modifiers 
  have been applied, some of which may cancel each other out.
  For example, in the Movement phase an Ironstrider Ballistarius 
  model Advances and then in the following Shooting phase 
  makes an attack with its twin cognis autocannon. The weapon 
  applies a -2 modifier to that attack’s hit roll, and so the model’s 
  controlling player uses the Protector Doctrina Imperative 
  Stratagem to also give a +2 modifier to the roll. Applying both of 
  these modifiers to the hit roll causes them to cancel each other 
  out, and no modifier is applied to the roll.
  Q: Can the Clandestine Infiltration Stratagem be used when you 
  set up a Stygies VIII Transport that has any embarked units? 
  A: Yes.
  Q: If a 6 is rolled for the invulnerable save conferred by a 
  Kastelan Robot’s Repulsor Grid ability, for an attack made by a 
  unit embarked upon a Transport with an ability such as Open-
  topped or Extended Firing Deck, which unit is the mortal wound 
  allocated to, the embarked unit or the Transport? 
  A: The embarked unit that is making the attack suffers the 
  mortal wound. 
  Q: Do I need to spend reinforcement points to return units when 
  using the Fresh Converts Stratagem?
  A: No.
  Q: If you have a Detachment which receives the Mars forge world 
  dogma, and another Detachment which receives a different 
  forge world dogma, what happens when rolling for Canticles 
  of the Omnissiah? With Mars’ dogma you roll two dice when 
  determining Canticles and units with that dogma benefit from 
  both results, but what happens for the other Detachment?
  A: In such cases you would roll dice separately for the Canticles, 
  rather than rolling for both together. The first Canticle rolled 
  for would apply to all of your units with the Canticles of the 
  Omnissiah ability, while the second would apply only to those 
  units in Mars Detachments.
  Q: When is the Litany of the Electromancer Canticle resolved?
  A: Immediately – i.e. at the start of the battle round when the 
  Canticle is chosen/rolled for.
  Q: Does a weapon that ignores cover ignore the benefit bestowed 
  by the Shroudpsalm Canticle?
  A: Yes.
  Q: Can the Refusal to Yield dogma be used to prevent a unit 
  from being slain due to a 1 being rolled to hit when it uses its 
  plasma weapon?
  A: Yes.
  
  3
  WARHAMMER 40,000 – CODEX: ADEPTUS MECHANICUS
  Q: How do the Chorister Technis Warlord Trait and Glory to the 
  Omnissiah dogma interact – when do I re-roll the first dice?
  A: Roll the first dice, then (if you wish) re-roll it. Then roll the 
  second dice.
  Q: How do the Gloria Mechanicus Stratagem and Glory to the 
  Omnissiah dogma interact – which Canticle can you change with 
  this Stratagem?
  A: Choose one Canticle to change.
  Q: When using the Binharic Override Stratagem, when do the 
  new Battle Protocols you choose come into effect?
  A: Immediately.
  Q: When using the Cognis Overwatch Stratagem, do I apply any 
  relevant modifiers to the firing model’s Ballistic Skill?
  A: Yes, as long as the weapon is a cognis weapon. Note that 
  modifiers to hit rolls do not apply.
  Q: When using the Monitor Malevolus Warlord Trait, can you re-
  roll a dice that determines how many mortal wounds are inflicted 
  on an enemy unit (i.e. is this classed as a damage roll?)
  A: No, such a roll is not classed as a damage roll.
  Q: Does the Static Psalm-code Warlord Trait affect the range of 
  the Master of Machines ability?
  A: No.
  Q: How does the Rage of the Machines Stratagem work with a 
  Vehicle unit that consists of more than one model?
  A: One Vehicle model from that unit would gain the benefit of 
  that Stratagem. 
  Q: If a Questor Mechanicus unit from your army is selected as the 
  target of the Knight of the Cog Stratagem, must every unit in that 
  Questor Mechanicus unit’s Detachment also have the Canticles of 
  the Omnissiah ability in order for that Questor Mechanicus unit 
  to benefit from it?
  A: No.
  Q: At what point does the invulnerable save of Fulgurite Electro-
  Priests get increased as a result of the Siphoned Vigour ability?
  A: When the last model of the enemy unit is slain and removed 
  from the battlefield. 
  Q: Can a Graia model that has the Refusal to Yield ability also 
  make use of rules that allow them to ignore lost wounds, such as 
  Fanatical Devotion?
  A: No.
  
  4
  WARHAMMER 40,000 – CODEX: ADEPTUS MECHANICUS
  WEAPON UPDATES
  RANGED WEAPONS 
  RANGE TYPE 
  S 
  AP D 
  ABILITIES 
   
   
   
  Cognis flamer 
  12" 
  Assault D6 
  4 
  0 
  1 
   Each time an attack is made with this weapon, that attack automatically hits the target. In 
  addition, when firing Overwatch with this weapon, roll two dice when determining how many 
  attacks it makes and discard the lowest result.
  Heavy bolter 
  36" 
  Heavy 3 
  5 
  -1 
  2 
  -
  Heavy flamer 
  12" 
  Heavy D6 
  5 
  -1 
  1 
  Each time an attack is made with this weapon, that attack automatically hits the target.
  Meltagun 
  12" 
  Assault 1 
  8 
  -4 
  D6 
   Each time an attack made with this weapon targets a unit within half range, that attack has 
  a Damage characteristic of D6+2.
  Multi-melta 
  24" 
  Heavy 2 
  8 
  -4 
  D6 
   Each time an attack made with this weapon targets a unit within half range, that attack has 
  a Damage characteristic of D6+2.
  Plasma caliver 
  Before selecting targets, select one of the profiles below to make attacks with. 
   
   
   
   
  - Standard 
  18" 
  Assault 2 
  7 
  -3 
  1 
  -
  - Supercharge 
  18" 
  Assault 2 
  8 
  -3 
  2 
   If any unmodified hit rolls of 1 are made for attacks with this weapon profile, the bearer is 
  destroyed after shooting with this weapon.
  Plasma cannon 
  Before selecting targets, select one of the profiles below to make attacks with. 
   
   
   
   
  - Standard 
  36" 
  Heavy D3 
  7 
  -3 
  1 
  Blast
  - Supercharge 
  36" 
  Heavy D3 
  8 
  -3 
  2 
   Blast. If any unmodified hit rolls of 1 are made for attacks with this weapon profile, the 
  bearer is destroyed after shooting with this weapon.
  Plasma culverin 
  Before selecting targets, select one of the profiles below to make attacks with. 
   
   
   
   
  - Standard 
  36" 
  Heavy D6 
  7 
  -3 
  1 
  Blast
  - Supercharge 
  36" 
  Heavy D6 
  8 
  -3 
  2 
   Blast. If any unmodified hit rolls of 1 are made for attacks with this weapon profile, the 
  bearer is destroyed after shooting with this weapon.
  MELEE WEAPONS 
  RANGE TYPE 
  S 
  AP D 
  ABILITIES
  Power fist 
  Melee 
  Melee 
  x2 
  -3 
  2 
  Each time an attack is made with this weapon, subtract 1 from that attack’s hit roll.
  Power sword 
  Melee 
  Melee 
  +1 
  -3 
  1 
  -
  
SOURCE: textdata/thevault/Warhammer/40k/9th Edition - Warhammer 40K/Errata & FAQs/2. Codex/CODEX - ADEPTUS MECHANICUS v1-1.pdf