Xal'atath Confirmed the Harbinger, Will Have a Unique Rivalry with Alleria Windrunner
Xal'atath and Alleria Windrunner are going to be front and central to the next World of Warcraft expansion, The War Within. Xal'atath is confirmed to be the Harbinger, and she and the Void Elf will have a «unique rivalry».
Xal'atath
From her introduction in Legion, Xal'atath has been a mysterious character who seems determined to do things her own way. First introduced as the Shadow Priest artifact weapon, the blade of Xal'atath was rumoured to be made from the claw of Y'Shaarj. An even wilder rumor claimed that Xal'atath was the remains of a forgotten Old God who was consumed by its kin — perhaps even the fifth Old God of legend.
Xal'atath, as we know her today, is the entity that was trapped within the blade. To free herself, Xal'atath eventually made a deal with the Old God N'Zoth — who severed her from the dagger and kept the blade for himself in exchange. In the end, the blade fell into the hands of Wrathion, who used the dagger to kill N'Zoth in our final confrontation with him.
As for Xal'atath, we most recently briefly saw her standing with Iridikron during the Dawn of the Infinite dungeon, before the two of them disappeared through a Void portal. Before leaving, Iridikron spoke of «The Harbinger», who will pry «our world» from the Titans grasp.
With the announcement of The Worldsoul Saga and The War Within, Xal'atath has finally been confirmed as the Harbinger. She has journeyed to the nerubians of Azj-Kahet, where she has enlisted them in her cause.
