Secure the settlements with armies - either add them to the garrison or just keep them around to allow a quick counterattack.

Reinforce the defenses of the three settlements - construct defensive buildings, build walls, etc.

The ritual takes a certain amount of turns to finish - if any of the settlements falls, it will mean a failure. You have to defend the settlements where the Ritual is being performed at all cost!Д®ach Ritual will be performed in three settlements at once - one of them will be your main city. See the bar at the top of the screen to see how much points you have hover over it to check how much you gain in each turn. If you'll be finishing missions along the way, you should feel a noticeable boost. It's important to gain control of one of these provinces during the initial turns, and then quickly try to conquer the other one. You can check their locations on the map above. These are settlements, where you can construct a special building that will yield a considerable boost to the ritual resource. Above that, the campaign map contains eight places of ritual resources (two for each continent). You get 1 point every turn for every province you're controlling then you can get some more for completing missions (and this is the best reason to finish them). Even though these resources have different names in every race ( Way fragments for High Elves, Scrolls of Hekarti for Dark Elves, Warpstone for the Skaven and Ancient Tablets for Lizardmen), they all work the same. In order to control the Great Vortex, each race has to perform five rituals - to be able to do that they have to control a certain amount of the resource. The cities that can provide a more significant amount of ritual resources are marked.

Warhammer 2 vortex map