Long Live the King
Long Live the King is not available until you have completed the first three scenarios in Heroes of Might and Magic III: Restoration of Erathia: Long Live the Queen, Dungeons and Devils, and Spoils of War.
The war in Erathia is the greatest thing that could have happened for the nation of Deyja. A war of this scale is an endless harvest for our undead armies. Today we shall feast, and tomorrow we shall conquer Erathia for ourselves.