Recently I have been thinking about Sargeras and the sword he stabbed in to Azeroth (Silithus).
After a ton of reading and speculation I have come to believe the following.
The sword of Sargeras is said to have been “crafted from hatred made manifest”. The red energy surrounding the sword that we later drain with our artifact weapons is pure hatred.
Every invasion from the legion has been lost and Sargeras probably realized some time ago that once united the Alliance and the Horde is a force to be reckoned with and the only way to purge the world in fire is to turn the two factions against each other.
So he stabs his sword crafted from hatred in to Silithus to corrupt us which I believe would explain a lot of the following events.
There is also something odd about the Sha of hatred. Sha of hatred is a demon by nature and not an elemental like all the other Sha. There is also a quote from Sha of hatred - " Your turn will come. Hate will turn you all against one another until this whole burns" .
I don’t believe there is a connection between the Sha of hatred and Sargeras except hatred. Both are the embodiment of hatred and I feel like the quote fits in with what’s been happening with Battle for Azeroth.
The Horde and Alliance have been fighting each other now for quite a bit and both factions are weakened. That would be the perfect time to make an appearance for N’zoth and Azshara who both have been watching us for some time. They linger in the background waiting for the right moment to strike.
One other thing I have been thinking about is that Silithus is where C’thun was imprisoned. It seems to be intentional and no coincidence that he put his sword in Silithus out of all places.
We have seen that prisons often lie below ground and are huge titan facilities. The sword must have destroyed something in this prison. I have no clue what this could mean.