Wrathion is “taken” during the Legendary Quest only to appear moments later in the other room… where we “free him” and he helps us create the legendary cloak from the black dragon… the same black dragons which bore the Old God corruption… yet creating a cape from his would “Protect us”…
Wrathion is the one to stab N’zoth with the dagger… But it does nothing???
Let me tell you that it’s all a LIE!
N’zoth was figuratively a shadow of his former self, no True physical form upon his release…
Azshara knew that the Dagger could contain N’zoth and his powers which if the Dagger whispered could be resisted… the power of the entity was granted to the wield… Azsara was able to resist the whispers of N’zoth and planned to use the Dagger to imprison N’zoth…
N’zoth tested the worlds champions and set them on a path to defeat Azshara but he could not let the dagger fall into the wrong hands as he needed the dagger to be “used” against him but under his circumstances…
N’zoth knew that the champions would not stop until he was defeated and as such began to attack Azeroth and it’s inhabitants by the mind… where he could show them there worst fears… but also there greatest desire…
He knew Wrathion alike all the black dragons where high susceptible to his whispers just like Deathwing and began to convince him to find the dagger… which was in the one place nobody could go. Ny’alotha. and So Wrathion crafted an item that he and his champion go enter Ny’alotha with… to resist the darkness within it… to travel, retrieve the dagger and use to defeat N’zoth…
We enter N’zoth vision… .Ny’alotha and battle our way to find Azshara and retrieve the dagger and Wrathion uses this to stab N’zoth… but we knew it didn’t work!!! and the Dagger disappeared… however we easily went on to defeat N’zoth without it using the Heart of Azeroth…
But what if… When Wrathion was “taken” and re-appeared within the next. It wasn’t Wrathion… or atleast the Wrathion we knew…
What if N’zoth instructed Wrathion to use the dagger on him… and the Dagger “imprisoned” N’zoth within the Dagger… a Dagger that Wrathion still held but now as the master of the vision… N’zoth Avatar… hid it from us and went on to show us the end of the vision… of us defeating N’zoth once and all…
but in reality…
The Old God. master of the mind… played the biggest trick he could of Azeroth… That he was dead… When the reality is… not the vision… not the dream. the reality is. N’zoth is within the dagger whom is wielded by his puppet… the new DEATHWING!