The Drowned

The Drowned are an odd hive mind of undead, imbued with powers from the primordial god Nu. On their own they are much like any other zombie, but with more gathered in the same location, so does the divided power of Nu. In large enough numbers they can generate storms and control water, often to drag more souls to their doom.
Nu luckily could not be reborn into it's primoridal form as the power from the Jude chalice was divided among the poor souls of Heracleion. Still there is some semblance of intelligence or vengance with a mob of drowned.