TEXT: 1
  WARHAMMER 40,000 – INDEX: CHAOS
  WARHAMMER 40,000
  INDEX: CHAOS
  Official Update Version 1.1
  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 14 – Cypher, Abilities
  Add the following ability:
  ‘No-one’s Puppet: Cypher cannot use the Daemonic 
  Ritual ability, even though he has the Chaos and 
  Character keywords.’
  Page 21 – Daemon Prince, Wargear Options
  Change the first sentence of the third bullet point 
  to read:
  ‘This model may have wings (Power Rating +1).’
  Page 36 – Warp Talons, Lightning claw
  Change the second sentence of the Abilities text to read:
  ‘If a model is armed with two lightning claws, each time 
  it fights it can make 1 additional attack with them.’
  Page 38 – Chaos Predator, Damage Table
  Change the top value under ‘Remaining W’ to 
  read ‘6-11+’.
  Change the second value under ‘Remaining W’ to 
  read ‘3-5’.
  Page 45 – Servants of Khorne
  Add the following to the end of this paragraph:
  ‘If a unit has the Tzeentch, Nurgle or Slaanesh 
  keywords, it cannot be from the World Eaters Legion.’
  Page 51 – Ahriman, Wargear Options
  Change the first sentence to read:
  ‘•  Ahriman may ride a Disc of Tzeentch (Power 
  Rating +2).’
  Page 52 – Exalted Sorcerer, Wargear Options
  Change the first sentence to read:
  ‘•  This model may ride a Disc of Tzeentch (Power 
  Rating +2).’
  Add the following bullet point:
  ‘•  This model may replace its force stave with a 
  force sword.’
  Page 57 – Death Guard Army List
  Add the following to the list of units that can be from 
  the Death Guard Legion:
  ‘Sorcerer on Palanquin of Nurgle (pg 24)’
  Page 63 – Servants of Slaanesh
  Add the following to the end of this paragraph:
  ‘If a unit has the Khorne, Tzeentch or Nurgle 
  keywords, it cannot be from the Emperor’s 
  Children Legion.’
  Page 69 – Nurgle Discipline, Virulent Blessing
  Change the last two sentences of this psychic power 
  to read:
  ‘Until the start of your next Psychic phase, you can add 
  1 to all wound rolls made by that unit in the Fight phase. 
  Furthermore, until the start of your next Psychic phase, 
  any wound rolls of 7+ made for that unit in the Fight 
  phase inflict double damage.’
  Page 80 – Kairos Fateweaver
  Add ‘Ephemeral Form’ to Kairos Fateweaver’s abilities.
  Page 98 – Herald of Slaanesh on Seeker Chariot, 
  Wargear Options
  Change the bullet point to read:
  ‘•  This model may take lashes of torment.’
  Page 99 – Herald of Slaanesh on Exalted Seeker 
  Chariot, Wargear Options
  Change the bullet point to read:
  ‘•  This model may take lashes of torment.’
  Page 105 – Daemon Prince of Chaos, profile line
  Change the Wounds characteristic to read ‘8’.
  Page 109 – Renegade Knight, Twin Icarus autocannon
  Change the this weapon’s Type to read ‘Heavy 4’.
  Page 118 – Units, Exalted Sorcerer
  Change the points per model value to read ‘112’.
  Page 118 – Units, Exalted Sorcerer on Disc of Tzeentch
  Change the points per model value to read ‘146’.
  Page 121 – Chaos Bastion Points Values, Ranged 
  Weapons, Heavy bolter
  Change the points per weapon value to read ‘8’.
  
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  WARHAMMER 40,000 – INDEX: CHAOS
  FAQs
  Q: Can I use the All is Dust ability to add 1 to invulnerable 
  saving throws?
  A: Yes, but only against attacks that have a Damage 
  characteristic of 1.
  Q: Can I use the All is Dust ability to add 1 to my saving 
  throws against attacks that have a Damage characteristic of D3, 
  or D6, but only inflict 1 damage?
  A: No. The Damage characteristic is not ‘1’. 
  Furthermore, the roll to inflict damage would occur 
  after the saving throw would be taken (i.e. you cannot 
  retroactively pass a saving throw).
  Q: Can a Noise Marine use his Music of the Apocalypse ability 
  if it flees the battlefield?
  A: No. This ability can only be used when the model 
  is slain.
  Q: Can a Noise Marine that is slain use his Music of the 
  Apocalypse ability to shoot any viable target, or does it have to 
  target the unit that killed him?
  A: It can shoot at any viable target.
  Q: If several Noise Marines are slain in the same attack, can 
  they each use their Music of the Apocalypse ability to throw a 
  grenade, or can only one of them do so?
  A: Each of them can throw a grenade.
  Q: If a Noise Marine is slain whilst its unit is within 1" of an 
  enemy unit, can he use his Music of the Apocalypse ability to 
  shoot the unit that is within 1"?
  A: Yes, but only with a Pistol.
  Q: If a Noise Marine is slain in the Fight phase, and he uses 
  his Music of the Apocalypse ability to shoot an Imperium 
  unit and subsequently rolls a 6+ to hit, does the Death to the 
  False Emperor ability then grant him an extra attack with that 
  weapon, even though it’s a ranged weapon?
  A: Yes. In this situation, make an extra hit roll against 
  the target on a hit roll of 6+.
  Q: What happens when a unit of Poxwalkers kills a Necron 
  Warrior in the Fight phase? Do I still add a Poxwalker even 
  though that Necron could reanimate?
  A: A Poxwalker is added to the Poxwalkers unit as 
  normal. At the start of the Necron player’s next turn, 
  they roll to reanimate that Necron Warrior as normal 
  too (essentially both players could end up adding a 
  model to their unit).
  Q: The points values for certain units are different in Index: 
  Chaos to the Dark Imperium Death Guard booklet. Which 
  should I use?
  A: Use the values printed in the Index book.
  Q: If Skarbrand is within 8" of model that can Fly and has a 
  minimum speed (such as a some Flyers), and that unit starts its 
  Movement phase within 1" of an enemy unit, what happens? Is 
  that unit destroyed because it cannot Fall Back and so cannot 
  move its minimum speed?
  A: Correct, the unit is destroyed.
  Note, however, that some Flyers have an ability that, 
  when used, means they no longer have a minimum 
  speed that turn (e.g. the Stormraven Gunship’s Hover Jet 
  ability). If such a unit ends up in the situation described 
  in the question, we recommend using their ability to 
  avoid crashing into the ground!
  Q: If I use Xirat’p’s Sorcerous Barrage to automatically manifest 
  a psychic power in a matched play game, can I still attempt to 
  manifest the same power with a different psyker that turn?
  A: No, unless that power was Smite.
  Q: If a Burning Chariot takes its option to be accompanied 
  by three Blue Horrors, does this mean I add three Blue Horror 
  models from the Horrors datasheet and form a mixed unit?
  A: No. This option is referring to the optional Blue 
  Horror crew that come with the Burning Chariot kit and 
  are placed on top of the chariot alongside the Exalted 
  Flamer. If you have them, you simply get the benefits 
  listed in the Burning Chariot’s Irritating Chant ability.
  Q: When I manifest the Warptime psychic power, can I select a 
  unit that arrived on the battlefield as reinforcements this turn?
  A: Yes.
  Q: If I manifest the Warptime psychic power to move a unit 
  in the Psychic phase, does that unit still suffer the -1 penalty 
  for moving and firing Heavy weapons in the subsequent 
  Shooting phase?
  A: Yes.
  Q: Can a Heretic Astartes Character attempt to 
  summon a unit of Daemons using a Daemonic Ritual, or can 
  only Daemon Characters attempt to do so?
  A: Any Chaos Character can attempt to do so. This 
  includes Heretic Astartes Characters.
  Q: There is no datasheet for a Herald of Nurgle on a Palanquin 
  of Nurgle – which datasheet should I use for this model?
  A: Use the Epidemius datasheet from Index: Chaos.
  
SOURCE: textdata/thevault/Warhammer/40k/1st-8th Editions (Prior)/8th Edition (2017)/5) FAQs/2017 FAQs/40K_8th_ed_Update_Index_Chaos_ver_1.1.pdf