So the Emerald Dream is an “Exact Copy” of Azeroth. It was designed to be a perfect world of nature, unspoiled by civilization.
This is where things get a bit weird. In the Emerald Nightmare raid, there’s the boss Il’gynoth. He’s best known for his puzzling whispers that people think drop hints for the future. However, anyone who reads his description in game (and the map) should catch something else:
Nightmare Un'goro Crater: A darkness grows in the middle of the jungles of this titan-shaped crater, the heart of corruption known as Il'gynoth beats from within a Nightmare-twisted world tree.
What should you get from that? Well, the last two words really. See, as of now, there’s only 4 known World Trees in Warcraft:
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Nordrassil - Hyjal - the “original”* World Tree. It was devastated during a Burning Legion invasion, but it has regrown since then. *Was originally said to be the original, but now we don’t know because Shaladrassil’s timeline throws that into question now, as Shaladrassil’s keeper mentions he was watching Shaladrassil before Nordrassil was even around.
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Teldrassil - Darkshore - the “newest” World Tree and only other world tree to receive any of the Dragon Aspect’s Blessings. Planted by Malfurion after Nordrassil’s “destruction” in an attempt to return the Night Elve’s immortality (failed as it never received the Bronze Aspect’s blessing). Destroyed by Sylvanas and the Horde in BFA.
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Andrassil / Vordrassil - Grizzly Hills - Grown by Staghelm to stop the spread of Saronite in Northrend. It failed, and they were forced to cut it down fearing it would be corrupted without the Dragon Aspects Blessings, renaming it Vordrassil. However, its roots had already pierced Yogg Saron’s prison, giving the Old Gods access to the dream to create the Nightmare.
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Shaladrassil - Val’Sharah - Not much is known about it, as it was introduced during Legion, and was already fully corrupted by the Emerald Nightmare by the time we arrived, and that as stated above, it’s possible it was the original World Tree, but the Night Elves for some reason didn’t know about it.
So, what’s the issue then? Well, Il’gynoth is located in the Emerald Dream equivalent of Un’goro Crater.
What isn’t located in Un’goro Crater? That’s right. A world tree. But what do we see when we fight Il’gynoth in the Nightmare, which is literally the Emerald Dream? That’s right… A world tree. He’s literally sitting inside of it. (When you do the intro quests for the druid class hall, you see that the nightmare is literally just the dream corrupted. They don’t add extra stuff to the dream.)
So, the question beckons - Where is the World Tree that supposedly exists in Un’Goro Crater?
Although Hearthstone is not canon to Warcraft, Tortollans did come from Hearthstone, and in Hearthstone, Tortollans came from Un’Goro. Is it possible that Tortollans are protecting the World Tree in Un’Goro, similar to how the Night Elves are the protectors of the other World Trees? We’ve seen they have scrolls that do many things. Is it possible they have scrolls that can render a world tree invisible and intangible?