Posted 24 April 2015 - 06:44 PM
It is tough to speculate as FoD still ends well before any of these events could have transpired.
The sides in the war have to be more defined, the Tiste lands need to become divided by it into Emurlahn and Liosan (and at the same time or after become warrens). The Eleint need to do something, become part of K'rul's scheme for the warrens, some Tiste need to become soletaken, they need to fight their war, Tulas needs to participate (or witness) the war on death, and at some point take the throne of Shadow if there is one (although some of that could be after this vow).
And because SE is such a bastard, the conversation itself (including Tulas' near inner monologue) is needlessly cryptic. Thus we don't know whether the repeated "How did he manage it?" refer to simply keeping the secret, or vowing to DO something and keeping it secret. We also don't know if Tulas suddenly forgives him for having done it, or kept the secret, or because he just realized the burden the secret placed on Rake for millenia.
I mean, whoever you want to say Edgewalker is you can make up a scenario where that is what they are talking about. And each theory has its flaws
Urusander: Rake kills him in misplaced vengeance, learns of his error and vows to make it right, and somehow manages to free him, but as a servant of shadow.
Hunn Raal: Rake vows to force him to eternally serve the realm (interesting that the third book is called "walk in shadow" which sounds a lot like a curse you might place on someone.
River god: The war leads to further crimes on the deniers and their god, the lands making up the new shadow warren impinge on their home, and Rake does something that results in the River God become a protector of the shattered realm, either due to his part in the war, or the taking of blood of T'iam that supposedly led to the shattering of the warren.
Azathenai aspected to death: Rake feels bad for his part in the war shattering the warren and mother dark turning away, and vows to find a protector to 'trace the edges' of the shattered realm, and at some point bargains with Hood to have the somehow defeated Azathenai representing death released to be a guardian for shadow. Holes in this too, but explains why Hood would ask Edgewalker to "mitigate" in the deal he was making with Rake.
Tatts early in SH game: Hmm, so if I'm liberal I should have voted Nein to make sure I'm president? I'm not that selfish
Tatts later in SAME game: I'm going to be a corrupt official. I have turned from my liberal ways, and now will vote against the pesky liberals. Viva la Fascism.
When Venge's turn comes, he will get a yes from Mess, Dolmen, Nevyn and Venge but a no from the 3 fascists and me. **** with my Government, and i'll **** with yours