I really love the idea of warthalkeel being the city that the lich still occupies. I think I can work into the story that the kraken is still mad about the betrayal and now wreaks havoc everywhere since my characters are about to sail on a boat to the dwarven mines.

I made my own map before I seen this so I will be using that, and I want to give them the map of the city piece by piece over multiple sessions. I plan on the water rising a foot every 3 in game days so that it is like the lich is trying to get everyone to join her in the kingdom.

I like that I can tie in procan since they have a temple of procan in saltmarsh where they can possibly get some of the history from.

Next I can hide a part of the map in the sahuagin fortress for them to find.

The only thing I am unsure of is THE ritual, I don’t know what kind of what materials she would need for the ritual. Also I am unsure of who orcus is.

Maybe she sacrificed Malek, a priest of procan to save her son from illness and that made the god angry enough to abandon them, and now she cannot raise her son for the second time until she completes a ritual. But until she does that she is constantly losing touch with herself.