The central character of most promotional material for World of Warcraft: The War Within is a character we met back in Legion, but who has had a hand in events of Warcraft's past since at least the time of vanilla WoW (and possibly even Season of Discovery). The void entity Xal'Atath, once trapped in a Shadow Priest dagger and now given fleshy Elven form in Battle for Azeroth, is poised to be one of the Worldsoul Saga's most significant players.