TEXT: 1
  IMPERIAL ARMOUR – INDEX: FORCES OF CHAOS
  WARHAMMER 40,000 – IMPERIAL ARMOUR
  INDEX: FORCES OF CHAOS
  Official Update Version 1.4
  Although we strive to ensure that our rules are perfect, 
  sometimes mistakes do creep in, or the intent of a rule 
  isn’t as clear as it might be. These documents collect 
  amendments to the rules and present our responses to 
  players’ frequently asked questions. As they’re updated 
  regularly, each has a version number; when changes 
  are made, the version number will be updated, and any 
  changes from the previous version will be highlighted 
  in magenta. Where a version number has a letter, 
  e.g. 1.1a, this means it has had a local update, only in 
  that language, to clarify a translation issue or other 
  minor correction.
  ERRATA
  Page 8 – Chaos Decimator, Keywords
  Delete ‘Titanic’ from this datasheet’s Keywords line.
  Page 9 – Plague Hulk of Nurgle, Faction Keywords 
  and Keywords
  Add ‘Heretic Astartes, <Legion>’ to this datasheet’s 
  Faction keyword line and ‘Daemon Engine’ to this 
  datasheet’s Keywords line.
  Page 9 – Plague Hulk of Nurgle, Rusting Curse
  Change this ability to read:
  ‘Subtract 1 from saving throws (excluding invulnerable 
  saving throws) made for Vehicle models whilst 
  their unit is within 1" of any enemy Plague Hulk of 
  Nurgle models.’ 
  Page 10 – Greater Brass Scorpion of Khorne, Runes of 
  the Blood God
  Delete the words ‘(friendly or enemy)’ from this ability.
  Add the following to this ability: ‘Furthermore, this 
  model cannot be targeted by psychic powers manifested 
  by friendly Psykers.’ 
  Page 12 – Hellforged Contemptor Dreadnought, 
  Containment Breach
  Change the third sentence to read:
  ‘Each unit within 6" suffer D3 mortal wounds unless 
  it is a Psyker, in which case it suffers D6 mortal 
  wounds instead.’
  Pages 12, 20 and 22 – Hellforged Contemptor 
  Dreadnought, Hellforged Deredeo Dreadnought and 
  Hellforged Leviathan Dreadnought
  Add ‘Helbrute’ to the Keywords line of all 
  these datasheets.
  Page 12 – Hellforged Contemptor Dreadnought, 
  Wargear Options
  ‘• A Hellforged Contemptor may replace one deathclaw 
  and one combi-bolter with one of the following weapons 
  (both death claw and combi-bolter must be replaced). 
  Alternatively, it can replace both deathclaws and both 
  combi-bolters for two of the following weapons:
  ‒‒- Twin heavy bolter
  ‒‒- Multi-melta
  ‒ -‒Twin autocannon
  ‒‒- Ectoplasma cannon
  ‒‒- Kheres assault cannon
  ‒‒- C-beam cannon
  ‒‒- Butcher cannon
  ‒‒- Twin lascannon’
  Add the following wargear option:
  ‘• This model may take a havoc launcher.’
  Pages 12-29 – Machina Malefica
  Change this ability in all instances to read:
  ‘At the end of each Fight phase, roll a number of D6 
  for this model equal to the number of models that were 
  slain by it during this phase; for each dice that scores 
  a 5+, this model regains one lost wound. This model 
  cannot regain lost wounds by any other means.’
  Pages 13 and 14 – Hellforged Land Raider Proteus and 
  Hellforged Land Raider Achilles, Containment Breach
  Change the third sentence of this ability to read:
  ‘Each unit within 6" suffers D6 mortal wounds unless it 
  is a Psyker, in which case it suffers 2D3 mortal wounds.’
  Page 19 – Hellforged Spartan Assault Tank, Abilities
  Add the following ability:
  ‘Daemonic Machine Spirit: This model does not 
  suffer the penalty to its hit rolls for moving and firing 
  Heavy weapons.’
  Page 20 – Hellforged Deredeo Dreadnought, 
  Wargear Options
  Change the second wargear option to read:
  ‘•  A Hellforged Deredeo Dreadnought may be equipped 
  with one of the following:
   
  - Greater havoc launcher
   
  - Hellfire veil’
  
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  IMPERIAL ARMOUR – INDEX: FORCES OF CHAOS
  Page 20 – Hellforged Deredeo Dreadnought, 
  Hellfire Veil
  Change the first sentence of this ability to read:
  ‘If equipped with a Hellfire veil, all friendly units with 
  the Chaos and <Legion> keywords that are wholly 
  within 6" of the Hellforged Deredeo Dreadnought gain 
  a 5+ invulnerable save.’
  Page 21 – Hellforged Rapier Battery, Chaos Space 
  Marine Crew
  Change this ability to read:
  ‘When a Hellforged Rapier Battery is set up on the 
  battlefield, all models are set up in unit coherency. 
  From that point onwards, all the Hellforged Rapiers 
  are treated as one unit and all the Chaos Space Marine 
  Crew are treated as another. Chaos Space Marine Crew 
  may only be chosen as a target in the Shooting phase if 
  they are the closest visible unit to the firer.’
  Page 21 – Hellforged Rapier Battery, Keywords
  Change the keyword lines to read:
  ‘(Hellforged Rapier): Vehicle, Artillery, 
  Hellforged, Hellforged Rapier Battery
  (Chaos Space Marines): Infantry, Hellforged 
  Rapier Crew’
  Page 22 – Hellforged Leviathan Dreadnought, 
  Wargear Options
  Change the second wargear option to read:
  ‘•  A Hellforged Leviathan may replace one siege claw 
  and one meltagun for one of the following weapons 
  (or it can replace both siege claws and both meltaguns 
  for two of the following):’
  Pages 22 and 81 – Hellforged siege claw
  Add the following ability to this weapon:
  ‘Re-roll failed wound rolls against Infantry.’
  Page 23 – Hellforged Dreadclaw Drop Pod, Transport
  Change this datasheet’s Transport entry to read:
  ‘This model can transport 10 <Legion> Infantry 
  models. Each Jump Pack or Terminator model takes 
  up the space of two other models. This model can 
  instead transport a single Hellforged Contemptor 
  Dreadnought, Chaos Decimator or Helbrute, and 
  no other models. It cannot transport a Hellforged 
  Leviathan Dreadnought or a Hellforged 
  Deredeo Dreadnought.’
  Page 24 – Hellforged Kharybdis Assault Claw, Transport
  Change the first sentence to read:
  ‘This model can transport 20 <Legion> 
  Infantry models.’
  Page 26 – Hellforged Typhon Heavy Siege Tank, 
  Steel Behemoth 
  Change the second sentence to read: 
  ‘It can, except when firing Overwatch, also still fire its 
  weapons if enemy units are within 1” of it (however, its 
  dreadhammer siege cannon must target units that are 
  more than 1” away).’
  Page 27 & 80 – Fellblade Accelerator Cannon
  Change the Damage characteristic of this weapons HE 
  shells profile to 2. 
  Page 27 – Hellforged Fellblade, Wargear Options
  Change the first wargear option to read:
  ‘•  A Hellforged Fellblade may replace its two quad 
  lascannon with two laser destroyers.’
  Page 27 – Hellforged Fellblade, Steel Behemoth 
  Change the second sentence to read: 
  ‘It can, except when firing Overwatch, also still fire its 
  weapons if enemy units are within 1” of it (however, its 
  fellblade accelerator cannon and demolisher cannon 
  must target units that are more than 1” away).’
  Page 28 – Hellforged Falchion, Wargear Options
  Change the first wargear option to read:
  ‘•  A Hellforged Falchion may replace its two quad 
  lascannon with two laser destroyers.’
  Page 28 – Hellforged Falchion, Steel Behemoth 
  Change the second sentence to read: 
  ‘It can, except when firing Overwatch, also still fire its 
  weapons if enemy units are within 1” of it (however, its 
  twin volcano cannon must target units that are more 
  than 1” away).’
  Page 29 – Hellforged Mastodon, Steel Behemoth 
  Change the second sentence to read: 
  ‘It can, except when firing Overwatch, also still fire its 
  weapons if enemy units are within 1” of it (but only its 
  hellflamers and lascannons can target units that are 
  within 1” of it – its other ranged weapons must target 
  other units).’
  Pages 33 and 34 – Chaos Storm Eagle Assault Gunship 
  and Chaos Fire Raptor Assault Gunship, Damage Tables
  Change the third value under ‘BS’ to read ‘5+’
  Page 39 – Zhufor the Impaler, Faction Keywords
  Change this datasheet’s Faction Keywords line to read:
  ‘Chaos, Heretic Astartes, Khorne, World 
  Eaters, Skulltakers’
  Page 41 – Lord Arkos, Faction Keywords
  Change this datasheet’s Faction Keywords line to read:
  ‘Chaos, Heretic Astartes, Alpha Legion, 
  The Faithless’
  Page 49 – Aetaos’rau’keres
  Change the Dark Jealousy ability to read:
  ‘If, at the beginning of the controlling player’s Shooting 
  phase, another Lord of Change or Daemon Prince is 
  within 12" of Aetaos’rau’keres, roll one D6. On a 4+ the 
  Staff of Cataclysm’s ranged attack must be used against 
  the closest Lord of Change or Daemon Prince, other 
  than Aetaos’rau’keres (friend or foe, contrary to the 
  usual rules for targeting Characters).’
  
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  IMPERIAL ARMOUR – INDEX: FORCES OF CHAOS
  Page 49, Aetaos’rau’keres, Staff of Cataclysm
  Change the second sentence of the abilities to read:
  ‘If a unit of at least 10 Infantry models has its last 
  models slain by this attack, a unit of 3 Flamers of 
  Tzeentch is added to your army and immediately 
  placed within 6” of the slain unit and more than 1" from 
  any enemy models before it is removed.’
  Page 50 – Mamon Transfigured, Faction Keywords
  Change this datasheet’s Faction Keywords line to read:
  ‘Chaos, Heretic Astartes, Daemon, Death Guard, 
  The Tainted’
  Pages 45-56 – Faction Keywords
  Add ‘Daemon’ to all these units’ Faction Keywords line 
  (and delete it from their Keyword line).
  Page 53 – Pox Riders of Nurgle, Keywords
  Add ‘Plaguebearer’ to this datasheet’s Keywords line.
  Page 54 – Spined Chaos Beast, Daemonic Allegiance
  Change this ability to read: 
  ‘When this model is chosen as part of an army, the 
  controlling player must select one of the following 
  keywords, replacing its <Allegiance> keyword: 
  Khorne, Tzeentch, Nurgle or Slaanesh. This model 
  will gain one additional ability based on the chosen 
  keyword; if Khorne is chosen, it gains Unstoppable 
  Ferocity; if Tzeentch is chosen, it gains Ephemeral 
  Form; if Nurgle is chosen, it gains Disgustingly 
  Resilient; and if Slaanesh is chosen, it gains 
  Quicksilver Swiftness.’
  Pages 54 and 85, Warp Spines
  Change this weapon’s ability to read:
  ‘Normal attacks cannot be made with this weapon. 
  Instead, roll a D6 each time a Spined Chaos Beast ends a 
  charge move within 1" of an enemy unit, or an enemy unit 
  ends a pile-in move within 1" of the Spined Chaos Beast. 
  On a 2+ that enemy unit suffers a single automatic hit.’
  Page 55 – Giant Chaos Spawn
  Add <Allegiance> to this unit’s Faction Keywords line.
  Add the following ability:
  ‘Daemonic Allegiance: When this model is chosen as 
  part of an army, the controlling player must select one 
  of the following keywords, replacing its <Allegiance> 
  keyword: Khorne, Tzeentch, Nurgle or Slaanesh. 
  This model will gain one additional ability based on 
  the chosen keyword; if Khorne is chosen, it gains 
  Unstoppable Ferocity; if Tzeentch is chosen, it 
  gains Ephemeral Form; if Nurgle is chosen, it gains 
  Disgustingly Resilient; and if Slaanesh is chosen, it 
  gains Quicksilver Swiftness.’
  Add the following abilities from the Spined Chaos 
  Beast datasheet to this datasheet: Unstoppable 
  Ferocity, Ephemeral Form, Disgustingly Resilient and 
  Quicksilver Swiftness.
  Pages 42 and 43 – Chaos Hellwright and Chaos 
  Hellwright on Dark Abeyant, Abilities, Master 
  of Mechanisms
  Change ‘Questor Traitorous’ to read 
  ‘Questor Traitoris’.
  Pages 58-64 – Renegade Knight Acheron, Renegade 
  Knight Lancer, Renegade Knight Castigator, 
  Renegade Knight Atropos, Renegade Knight Magaera, 
  Renegade Knight Porphyrion and Renegade Knight 
  Styrix, Keywords
  Change ‘Questor Traitorous’ to read 
  ‘Questor Traitoris’.
  Pages 58-64 – Renegade Knight Acheron, Renegade 
  Knight Lancer, Renegade Knight Castigator, Renegade 
  Knight Atropos, Renegade Knight Magaera, Renegade 
  Knight Porphyrion and Renegade Knight Styrix, 
  Abilities, Infernal Knight Titan
  Replace this ability with the following:
  ‘Super-heavy Walker: This model can Fall Back in the 
  Movement phase and still shoot and/or charge in the 
  same turn. When this model Falls Back, it can move over 
  enemy Infantry and Swarm models, though it must 
  end its move more than 1" from any enemy units. In 
  addition, this model can move and fire Heavy weapons 
  without suffering the penalty to its hit rolls. Finally, this 
  model only gains a bonus to its save for being in cover if 
  at least half of the model is obscured from the firer.’
  Pages 62, 64 and 86 – Reaper chainsword
  Change the Strength characteristic of this weapon 
  to ‘+6’.
  Page 63 – Renegade Knight Porphyrion, Abilities
  Delete the ‘Explodes’ ability from this datasheet.
  Page 72 – Daemon Bound Points Values, 
  Soulburner petard
  Change the points value of this weapon to read ‘60’.
  FAQs
  Q: Are there any restrictions on which Legion I can choose when 
  replacing the <Legion> Faction Keyword on datasheets within 
  this book?
  A: Yes, as follows: 
  You can only choose for a unit to be from the World 
  Eaters Legion if it has the Khorne keyword, or if it 
  has the <Mark of Chaos> keyword and you choose to 
  replace that with Khorne.
  You can only choose for a unit to be from the Thousand 
  Sons Legion if it has the Tzeentch keyword, or if it 
  has the <Mark of Chaos> keyword and you choose 
  to replace that with Tzeentch. You cannot choose for 
  a Hellforged Rapier Battery, a Chaos Hellwright or 
  a Chaos Hellwright on Dark Abeyant to be from the 
  Thousand Sons.
  
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  IMPERIAL ARMOUR – INDEX: FORCES OF CHAOS
  You can only choose for a unit to be from the Death 
  Guard Legion if it has the Nurgle keyword, or if it has 
  the <Mark of Chaos> keyword and you choose to replace 
  that with Nurgle. You cannot choose for a Hellforged 
  Rapier Battery, a Chaos Hellwright or a Chaos Hellwright 
  on Dark Abeyant to be from the Death Guard.
  You can only choose for a unit to be from the Emperor’s 
  Children Legion if it has the Slaanesh keyword, or if 
  it has the <Mark of Chaos> keyword and you choose to 
  replace that with Slaanesh.
  Otherwise, any of the units in this book can be from 
  any Legion.
  Q: There is no datasheet for a Ferrum Infernus Chaos 
  Dreadnought – is there a datasheet I should use for this model?
  A: Use the Helbrute datasheet on page 33 of 
  Index: Chaos.
  Q: There is no datasheet for an Emperor’s Children Sonic 
  Dreadnought – is there a datasheet I should use for this model?
   A: Use the Helbrute datasheet on page 33 of Index: 
  Chaos. It must replace its <Mark of Chaos> keyword 
  with Slaanesh, it must replace its <Legion> keyword 
  with Emperor’s Children, and it has two additional 
  wargear options; it may take a doom siren, and it may 
  replace its multi-melta with two blastmasters.
  Q: There is no datasheet for a Chaos Vindicator Laser Destroyer 
  – is there a datasheet I should use for this model?
  A: Use the Deimos Pattern Vindicator Laser Destroyer 
  datasheet on page 8 of Imperial Armour Index: Forces of 
  the Adeptus Astartes. It gains the Hellforged keyword 
  and must replace all of its Faction keywords with the 
  following: Chaos, Heretic Astartes, <Mark of 
  Chaos>, <Legion>.
  In addition, it gains the following ability:
  ‘Machina Malefica: At the end of each Fight phase, roll 
  a number of D6 for this model equal to the number 
  of models that were slain by it during this phase; for 
  each dice that scores a 5+, this model regains one lost 
  wound. This model cannot regain lost wounds by any 
  other means.’
  In addition, it gains the following weapon:
  ‘Weapon 
  Range Type 
  S 
  AP D Abilities
  Infernal Hunger Melee Melee User -3 1 
  -’
  Q: Can a Chaos Vindicator Laser Destroyer make use of the 
  Linebreaker Bombardment Stratagem from Codex: Chaos 
  Space Marines?
  A: No.
  Q: Is the plasma destroyer supposed to have an ability that can 
  inflict mortal wounds upon the firer if a hit roll of 1 is made 
  for it?
  A: No.
  Q: Is the Chaos Hellblade suppose to have the Daemonic 
  Machine Spirit ability?
  A: No.
  Q: Can a Hellforged Contemptor Dreadnought, Hellforged 
  Deredeo Dreadnought or a Hellforged Leviathan Dreadnought 
  use the Fire Frenzy Stratagem from e.g. Codex: Chaos 
  Space Marines?
  A: No.
  Q: Does the Plague Pact Stratagem in Codex: Death Guard 
  affect Arch-daemonic Rituals?
  A: No.
  Q: How many times can a Chaos Decimator armed with two 
  Soulburner Petards suffer a mortal wound as a result of a hit 
  roll of 1 for an attack made with this weapon. 
  A: Once per weapon (ie. In the case of a model armed 
  with two Soulburner Petards, this model could suffer 
  1 mortal wound when resolving the attacks of the first 
  weapon, then another mortal wound when resolving the 
  attacks of the second weapon).
  
SOURCE: textdata/thevault/Warhammer/40k/1st-8th Editions (Prior)/8th Edition (2017)/5) FAQs/2019 FAQs/40k 8e - imperial_armour_index_forces_of_chaos.pdf