Now that Chaos Space Marines have got their own Codex, the Index for Chaos is getting an update.
via Warhammer Community
That’s right friends, time for Chaos to be, well, chaotic. With the updates brought about by the Chaos Codex the Chaos Index is changing a little (go Tzeentch) to reflect that. The points for Daemonettes, Horrors, Bloodletters, and Plaguebearers are changing with the latest release. Similarly there are updates for the ways Brimstone Horrors work. And you’ll also see that Thousand Sons (and Be’lakor) have access to the Dark Hereticus Discipline:
Brimstone Horrors have been very popular in the new edition, and it’s not hard to see why – who doesn’t want to command an army of malicious, sentient magical flame? Even so, we’re keen to keep Chaos armies as diverse as possible, as well as making sure that Pink Horrors are just as powerful and as useful as their smaller cousins. To this end, Brimstone Horrors now cost slightly more points, while Pink Horrors cost less. You’ll also need 10 or more Pink Horrors in a unit to make full use of Smite. Finally, Plaguebearers, Daemonettes and Bloodletters now cost fewer points, making them a more attractive option when building your army. These changes are now the de-facto profiles and points for all these units
Secondly, if you’re a Thousand Sons player, you may have noticed that the Dark Hereticus discipline in the new codex is larger than the one in the Index. Don’t worry – the discipline isn’t being replaced and you won’t need to get Codex: Chaos Space Marines to keep using it. Similarly, if you have Codex: Chaos Space Marines, you’re welcome to use the expanded Dark Hereticus powers with your Thousand Sons Psykers. If you’re a Daemons player, this change also applies to Be’lakor.
You can find the full writeup below. So be sure and update your list of errata and datasheets for those units affected. Fortunately, thanks to the digital nature of the game rules, keeping these updates current is easier than ever.
Stay tuned for more Chaos updates–likely we’ll see another wave with the release of Deathguard.