The problem is that Blizzard is saying it happened without explaining / showing how.
I referenced this in another post but it is basically the “A wizard did it” scene from the Simpsons.
Well they can’t be that clever since they got tricked by an orc spirit trapped in a giant iceblock. Even though one of their masters can SEE THROUGH AND INTERACT WITH THE HELM AND WHOEVER IS WIELDING IT…
Unless…
That was Zovaal’s plan all along and they were only pretending to be tricked!! Mwahahaha!!
While it makes sense for the Nathrezim to shapeshift into Titan keepers or the demons who ARE allowed access to Argus, but that doesn’t account for them not having the required seals or how they hid whatever magic they used to alter Argus’ soul while directly under the gaze of Sargeras or his guards.