Frustration

We didn't have a Dalinar PoV of that moment, we had Ash's PoV for that, another one would be redundant. How did all eight of them not notice? Or better yet, how would Kalak have been so distracted he could miss nine deaths? Considering Ashynite magic is disease based, and Ishar is not only in full health, but had no way of cultiviating a disease like that for seven thousand years, I'm going to say Ashynite Bondsmithing is off of the table. Fortune and Connection are different so while there might be some interplay I doubt you could use one to manipulate the other. Moeloach was in Kharbranth at the time so Ishar wasn't in contact with him, and Glys is the first enlightened spren of his caliber, so it couldn't have been either of those. I'm pretty sure a man claiming to be the reincarnation of Adonalsium, is far too proud to do what someone else orders him to. And I'm not too bothered by other potential fakers as they don't defy previously established canon. Dalinar is already bonded to the Stormfather, and in riding the storm, he is in contact with everything the storm touches. How on roshar would Ishar do that? Lift was noticed as soon as she began interacting. And on the Nohadon vision Brandon has already told us the only people who could be doing that are Dalinar himself, and the God Beyond

You make me sad. Hymns are so good.

Yonath grinned, holding his knife out to ward them off. "You know, I used to wonder why Droit would make a man like me. I'm dangerous, I-I get people hurt." Noticing the withergeists getting too close, Yonath slashed outward, forcing them back. "But then, I discovered you things exist. And I realised, I'm not a monster. I'm the thing that kills them." Cackling with glee Yonath rushed forward, using his knife to ward away attacks, while slowly forcing the withergeists back towards the rest of the team.

I think that the Stormfather being able to lie is a much bigger twist than anything that could be done here. Additionally Ishar impersonating the Stormfather requires the subversion of pre-established information, which is not a good twist. I would suggest looking towards the Unmade then. What would such a scene add that the scene with Ash didn't already accomplish? It would just show us the same thing again. You are starting with your conclusion here. He can hear what happens in the visions, therefore, if Gavilar is talking to someone, who is not part of the visons he would notice. Additionally he would notice if his visions were being ended by someone other than him. How would Gavilar know the Stormfather would obey him in the first place? And if the Stormfather was the one who initially started obeying how would Ishar know to replicate that? That's not how theories work. Sorry, the science enthusiast in me just will not allow speculation to be called theory. From google I am aware I can come across as harsh, I honestly am not trying to. I try to find the nicest way to phrase something while still making my point. However interacting with other people has long been a weakness of mine, so fogive me if I mess up. Tips and pointers are welcome.

"YAA!" Yonath screamed, charging towards the rising withergeists. Flicking a match against his silver knife, the torchbrands he had inbeded into its sides ignited. Yonath wasn't sure whether he was allowed to do that or not, so he had decided not to ask. Screaming praises to Droit, Yonath plunged his knife into the nearest withergeist.

I have but I'll repeat myself. Heralds cannot sense each other suffer non-permenant death. Kalak was still alive but none of the others Ishar included could tell he was alive. To say otherwise is to directly contradict the books. The only other individuals who could possibly tell if a Herald died are the fused(Highly unlikely) Which could not be there as they were bound to Braize, Odium, who can barely connect to people with the Everstorm, and does not have the guile, nor the personality to pull this off, Culitvation, who acts nothing like the Stormfather in the prologue, and Honor, who died and his cognitive shadow fused with the Stormfather. Ishar did not have his blade at this time. The Unmade only recently appeared in Shinovar per Taravangian, and disreguarding that his experiments with spren only started a few months before RoW. So him hijacking the Visions is out of the question. The Stormfather would definatly have noticed someone hijacking the visions, so him doing nothing about it is weird. Additionally Whoever Gavilar is speaking to has the ability to bring people into the visions, and end them on command. The only being we know with the power to do that is the Stormfather. The Stormfather shows the ability to see the future, something Ishar definatly cannot do. But we know the Stormfather can due to his comments to Kaladin before Szeth attacked in WoR. The Stormfather obeyed Gavilar, something Ishar would never do. How would Ishar have even formed a Connection with Gavilar without touching him? And how would he maintain it? Every other time a Bondsmith has used Connection it has been temporary, why is this the exception?

That's the same kind of evidence they use for flat earth.

Please consider that theory means that there is evidence but it is unconfirmed. If there is no evidence it's a hunch or a guess, perhapse the term headcanon would be more accurate.

"Ya excited lad?" Yonath asked Linus. Carefully reading a prayer he had pre-prepared, Yonath braced himself. He hated waiting at the start of an attack, there was always something missing. Some level of power that action gave to him.

It leaks through from the spiritual realm

Come on guys we've had too many wars about this already.

When the "evidence" is mostly infered and unquantifiable it's not evidence. Correction: If there is evidence there is probably some merit. Well let's examine the first premise of the Stormfaker theory, that the Stormfather in the prologue isn't the real Stromfather. Do you have any concrete evidence for it? I don't see how that would corrupt it.

I'm aware, but the Everstorm itself is red.

"On your mark boss!." Yonath called riding to the left side.

Washing his mouth out with water Yonath spat onto the ground. "Well boys, seems we have our work cut out for us."

That would be my prediction.

I would say Renarin only uses Voidbinding with Illumination.

We haven't seen Voidbinding other than Renarin

We don't know that actually.

Considering the Everstorm was locked in the Cognitive realm at the time, and the spren isn't red, I think it's highy unlikely. If the Everstorm even has a spren. I didn't notice any difference between the two.

Well he does the same thing here "I have seen what is coming, and I will not prevent it." It's just a thing that will happen.

Renarin's surge of Illumination has been replaced by Voidbinding

Not really, I find theories are best made by taking the evidence and building up to a conclusion, rather than the other way around. I don't feel there is enough evidence for us to even say that it isn't the Stormfather, much less who an impersonater could be. He also give Gavilar a vision without there being a highstorm, and ended the vision on command. Taln was rather famous among the heralds for dying. He tried to kill Dalinar, ignored Kaladin's plea to spare people out in the storm, killed another group of people while showing Dalinar the tower. The Stormfather has no qualms about killing people, or leaving them to die.

Yonath climbed into his saddle, feeling himself slump slightly. He really needed to stop taking tona leaves right before missions. Even now he felt the urge to take another one, but no, right now he had a job to do. "Lesh ride bosh." Yonath said.

"Sounds good to me boss." Yonath said, spitting the leaf out.