Via Ian Bates, the red shirt guy from Blizzcon
https://x.com/TheRedShirtGuy/status/1813679642747773282?t=60p56EEdPzZhsL6jtvGvlw&s=19
Per the Warcraft Chronicles volume 4 book, Garrosh stated the Mak’gora was weapons and skill.
Blizzard… Then what the hell was Thralls lore in Legion when he lost his shamanistic powers
All this time Thralls shaman powers were lost because of what he did, you LITERALLY pointed out he lost his powers during the shaman campaign BECAUSE of what he did in Mak’gora
There was no retcon, because the rules were never set for the Mak’gora.
nothing says anything about banning magic
Already explained here:
and garrosh placed not limitation on what weapons/ skill could be call on in the heat of battle
Thrall losing his powers was about self-doubt. Not the Mak’gora. It’s already been that way.
Thrall lost his powers because he stole my kill. I still remember Thrall…I still remember.
Thrall lost his power because he lost faith in himself.
As a matter of fact, it says “all weapons and skills.” Skill with the elements is still a skill. That entire Tweet and passage is saying the same thing we’ve all been saying for years.
Yet somehow it’s a recon. 
Yeah wasn’t this a hotly debated topic at the time specifically because no one know what the actual rules were? This IS a retcon but not a bad one, this is adding much needed context.
i know but what can you do lol
Yup, this was confirmed via the final battle against Sylvannas. Thrall got over the self doubt and was able to raise bridges via shaman magic and cast other elemental spells to help us defeat her.
After they came out and basically said “Well… the previous Chronicles books aren’t actually set in stone” I’m not sure why anyone even cares about volume 4. I’m not going to bother with what is supposed to be a “lore book” that can be waived away as if written by an unreliable narrator.
That entire chronicle is a lie. Pay no attention to it.
Gamers were there, don’t give us this bull pie 1984 Double Speak
It was because right after WoD in Legion, Thrall lost his shamanistic powers, and everyone associated with “oh he cheated on Mak’gora and now he lost his shaman powers” and it was never because of cheating or anything, more like he felt he failed Garrosh, Cairne, Vol’Jin, the Horde itself and was carrying too much burden.
Can’t be a retcon if it is not changing something. It is adding context, yes, but not changing anything. It is pretty much explained here:
It adds something.
Retcon is a word that is misused often and to negative effect, but essentially anything that recontextualizes something via addition, change, or ignorance of something established prior, it’s a retcon.
In this case, the addition is that Garrosh called for no holds barred.
It’s a bit pedantic of me, but strictly speaking it does qualify as a retcon. Just a good one, frankly.
Even if that context isn’t needed to reason that Thrall didn’t cheat, it is needed to know Garrosh lost within his own parameters.
I’m not really into orc lore, but if you can change the rules whenever you want, it’s really… boring.
I mean, so it’s just a Duel without unique touch.
An orcish word for Duel.
Lame.
I’ve always seen the chronicles as an expensive paper weight.
Everyone knows that the elemental lords while chilling on their own plane of existence care a lot about orcish ritual fights.
Thrall losing his powers was due to the guilt he had for appointing Garrosh as Warchief, something even Garrosh said was a bad idea and that what Garrosh said did ring true. Even though Thrall tried to act like it didn’t. That being that Thrall failed Garrosh. Failed to prepare him for the role of Warchief, failed to give him proper counsel and failed to try and put him back on the right path after Deathwing was killed.