In StarCraft II: Legacy of the Void, you must help Zeratul fight his way through a vast single-player campaign and unite the Protoss tribes under a single force that will assure the survival of your race.
Missions
Legacy of the Void’s campaign will include about 20 new missions for StarCraft II covering the Protoss story. The actual mission types are yet unknown but you will encounter tribes which you must ally with or fight against.
Taking decisions like helping a tribe will anger another so you will have to build your own path through a diplomatic approach.
Characters
It's known that Jim Raynor and Sarah Kerrigan will feature in the story but Amon is the primary issue as he's the main Antagonist.
