@Sunrazer
The Rule of Two has always been an idea, lol.And? An idea alone doesn't "change the Sith Order forever".
Bane does meet Zannah at the end of PoD/beginning of RoT, and Zannah surpassing her Master isn't an instance of Bane himself changing the Sith Order. Bane taking Zannah as an apprentice, as it happens at the end of PoD, is "getting the new Order up and running".The criteria for the quote is Bane having changed the Sith Order "forever". I don't consider him just having found Zannah to be a permanent change. He still needs to train her, indoctrinate her into the RoT and then have her surpass him in order to get the loop going. Until he does that, all he has done is take a Sith apprentice, something that has been done countless times.
Also, I think it's worth pointing out that "change" isn't something that necessarily happens in an instant. Bane's eradication and replacement of the old Sith is something that happened over the course of three novels, not at any one time, which is why I think it makes little sense to ascribe one moment in time where "everything changed forever".
I'm talking about Bane giving Kaan the Thought Bomb to destroy the Brotherhood, which allows him to establish the Banite Order.Except he hasn't established anything yet. All he has done is killed the other Sith; he hasn't done anything different from them yet, he hasn't changed the way the Sith operate.
After all, does the quote not say that he used the knowledge and power he gained to change the Sith forever? How is Zannah killing Bane an instance of Bane using his knowledge and power to change the Sith forever?Because without Bane's knowledge and power, Zannah would never have been in a position to carry on the RoT. She is carrying out Bane's will by killing and surpassing him. And when she does that, she starts the chain of apprentice killing master; and that is the core difference between Bane's Sith Order and the old ones. There can only be two at any given time. That is how he "changed" the Sith.
Bane killing all the other Sith in the galaxy is only a prerequisite for this change, because if he didn't kill them his system would be fundamentally flawed.
Not to mention the word "change" instantly eliminates Zannah offing Bane as the instance in question. Zannah killing Bane cements the Rule of Two and the Banite Sith Order - it doesn't change the Sith Order. The final events of PoD change the Sith by destroying an Empire-based system and instating an order where there are only two Sith. That's the change.Zannah conspiring to learn everything Bane knows, kill him, then take on her own apprentice and do the same thing again, is how the Sith have changed. Bane killing lots of Sith isn't a change in Sith doctrine or behaviour. It's something Sith do quite a lot, albeit not on this scale.