You think that Vexiona is going to create Murozond because she couldn’t corrupt Alexstrasza(whom she calls sister) and Kalecgos into Void Dragons like herself?
Interestingly enough despite one of the Forum posters claiming Vexiona mentions Sinestra creating her(as a rebuttal to me assuming she is the Dream of Ysera) I saw no such thing ingame… I think the poster mistook her for the Twilight Drake in Deepholm encountered in Legion.
Starting to suspect Vexiona is the Dream of Ysera again… The Dream of Ysera is a construct based on Ysera just as the Statue of Alexstrasza is a construct based on Alexstrasza which is seen by Krasus as being just like her.
Merithra notes that Ysera didn’t return to the Emerald Dream when Elune claimed her so it is obvious that the Dream of Ysera is not her Ghost despite Wowpedia’s assumptions to the contrary(someone should correct that)!
Of course if she is the Dream of Ysera then she should theoretically have the word Twilight in some of her spells since the Void Entities that currently harass the Dream use the word Twilight in their spells.