"Zvvius the Hive Lord" is a boss in The Elder Scrolls Online Morrowind
Can be found in the Zainsipilu Dungeon, in a big chamber at the southwest corner of the dungeon (see map below)
Depending on level. For example at level 10, Zvvius drops some green items, most frequently a staff and medium armor, but sometimes other items. Also drops a soul gem. See below for sample loot:
- There is a book in the same room, Journal of a Fallen Officer. There's also a backpack which can sometimes contain a green recipe.