Well we can probably assume by now that the Jailer before his imprisonment decided that Death, being the opposite of Life and as I’ve always suspected, the most dangerous power out there.
I think that the Jailer in the past decided that Death being so powerful, should just consume all the other forms of power and leave the universe in a state of undeath.
To do so, the Jailer most likely reached out to the Void in some form, we can see that many times in the past we see how Necromancy and Void magic is often found together, not always but on several occasions.
And since we know the Jailer had ancient allies, we also know that the Light itself attacked in the Shadowlands, and the Light’s longest enemy has been the Void.
We also saw how the Dreadlords were found on an Old God infested planet when Sargeras discovered them and interrogated them, they in turn were playing their part and manipulated Sargeras into insanity, an act which sparked him to abandon his ways and create the Burning Legion in order to undo all the Titans work. This was with the help of the Void as the Dreadlords first used void magics more purely when first found and later started consuming Fel.
Now we have learned that they are probably created by Denathrius and are secret spies of Death, sent to infiltrate and corrupt all the other 5 powers.
We also see Sylvanas being a servant of Death, but is extremely empowered by shadow magics. Could be death magic but it looks alot different from the Jailers magics.
We know that Denathrius joined the Jailer later on, after first being part of imprisoning him. So what changed their?
Anyway, when we will fight Sylvanas in the Sanctum of Domination, I think her third death will somehow release the Voids influence in the cosmos.
Probably not what the Jailer wants though.
But it would seem as if the Jailer is behind the Burning Legion indirectly, it would make sense he had help from the Void in this case.
Since its a pretty spectacular thing to create an opposition force that is working to undo worlds, leaving them for Death to claim the remains of each world, apart from all the souls that Zovaal gathers from the destruction (besides the ones the demons hasn’t consumed).
What do you guys think? Is it possible that Death allied itsef with the Void?
And will Sylvanas third death usher in the Voids coming?