Something that was glossed over at the beginning – the emotion that powers Tzeentch is Hope. He’s not just about manipulating plans, he doesn’t that partly because scheming is in his nature but also partly because he feeds off of hope and encouraging people to scheme and drive themselves towards lofty goals and obtaining a better life for themselves is how he maximises that. He’s also about change to such an extent that most fans hold the opinion that he can never allow any one side to ultimately win because that would eventually lead to stagnation which as the antithesis of change would weaken him or would lead to everything being destroyed in which case change would cease completely, resulting in doom for him. To avoid this he’ll even go so far as screwing over himself and the other gods just to keep things in a place where change can continue.

Also, as a schemer, he has plans within plans and multiple contingencies; in fact often stopping one of his plans will make a dozen other ones succeed.

Another hallmark of his that was glossed over at the beginning is that one of his titles is The Great Mutator, and as such he is the god most prone to giving out mutations to his followers and if you look at older minis, usually the Tzeentch ones will be the most mutated and/or have the most far out mutations.

Also, while Khorne hates him for his magic use, Tzeentch’s arch rival is actually Nurgle. Tzeentch and Nurgle are antithesis of each other – Tzeentch embodies hope and change, Nurgle despair and stagnation.

On his daemons – I think what got you confused with regards to the names @warzan is that in previous editions there were two types of Horrors – Pink Horrors and Blue Horrors. Pink Horrors were pretty much as shown in the pic (albeit with a slightly different style due to the era they were sculpted in) who were capricious and happy-go-lucky. Blue Horrors were half the size and morose; but what made them stand out is that whenever you killed a Pink Horror, instead of being banished back into the Warp/Realm of Chaos, it would split into two Blue Horrors who would keep on fighting.

As for the Lords of Change being closest to Tzeentch, if you meant visually, then the answer is not exactly. Tzeentch is the god with the least fixed form and most prone to changing it on a whim or to suit the situation and actually most descriptions have him looking like a giant Horror.

One thing that was also glossed over daemonwise is that the daemonic mount some of his followers ride is called a Disc of Tzeentch and is created using a Screamer.

On the Thousand Sons, AJ’s statement that they didn’t look like that isn’t entirely true. He’s right that the colour scheme was different (red, white and gold instead of blue and gold), but he neglected to mention that they still had the Ancient Egyptian aesthetics, albeit to a lesser degree, as you can see from the cover of the A Thousand Sons book.

Another thing glossed over was that the Fleshchange was halted by Magnus when he bartered for knowledge from Tzeentch (although he didn’t know it was Tzeentch at the time or how powerful Tzeentch truly was).

On Magnus contacting the Emperor to warn him about Horus, AJ hasn’t quite got his facts straight. What happened was that the Emperor had withdrawn into his secret lab and was trying to build a Webway Portal. Magnus’s spell accidentally shattered the wards on the gateway which allowed the Daemons to enter the Eldar Webway and come through the Portal.

Also, the Emperor didn’t intend Russ and the Wolves to destroy the Sons; he wanted Magnus brought back to Terra for punishment. Horus (who everyone thought was still loyal at this point) contacted Russ and told him that the order had been changed to kill.

On Ahriman – there’s no ‘probably’ about it; he was the First Captain and one of Magnus’s closest advisors. Not only that but he was the head of the Corvidae, one of the five Cults of the Thousand Sons. The Cults were pretty much like the Colledges of Magic in Fantasy, so essentially that means he was the most powerful practitioner of that psychic discipline save for Magnus and the Emperor themselves. And that was before the Sons fell to Chaos.

On the Rubric of Ahriman – actually it wasn’t just the ones who didn’t have powers that got dusted; it also dusted those with latent/weak powers. It was only the ones who were already strong/powerful that got the power boost.

Little nitpick – technically AJ is right in that FW haven’t produced a Magnus mini yet, but the actual answer to @warzan ‘s question is yes. Magnus did have a mini back in the day, but it was for Epic rather than 40k (and it was gods awful – it looked like a winged monkey with a big busy pirate beard and for some reason the GW painters decided to paint him blue skin and orange hair/beard).

On other Thousand Sons characters – it’s unlikely we’ll get anything else on Ahriman’s brother considering he’s dead. The Ahriman brothers both succumbed to the Fleshchange. Magnus managed to reverse it in time to save Ahzek, but not in time to save Ohzmund.

On the minis – actually that isn’t an empty suit, that’s one of the Aspiring Sorcerers. The conversion bits you see around it are used to make regular Chaos Space Marine minis into Rubricae who are the empty suits (well, suits filled with dust and bound to the spirit of the marine who wore it at the time the Rubric was cast and animated by it).

On the Thousand Sons hate Ahriman – not quite; there was a split when Magnus exiled Ahriman. Some stayed on the Planet of Sorcerers with Magnus, but some left with Ahriman, so not all of them hate him.

Libraries Conclave sounds like fun, when I get back into 40k I’ll have to see about adding one to my Thousand Sons army 🙂