Set piece battles
They involve fighting a pre-scripted battle against specific enemies in a specific battle map. In the campaign, set piece battles usually come as part of a quest for a legendary lord to gain a legendary item. In campaign, these battles can only be accessed by moving to a specific location on the campaign map (players also have the option of instantly teleporting the legendary lord's army to the location at the cost of money). However set piece battles can also be accessed as a separate game mode, from the main game menu.
See the following pages: