Oh, ooh!, I just came to think of something... Options

[Fethenwen]

I remember now of encountering some very strange daedric monsters, I'm not even sure if they very daedra or what. But there was these very scary spell casting monsters with tentacles, they looked a bit like elefants on two legs.

Does anyone have any lore about what these guys are?

[Rohugh]

From The Imperial Library -

Ash Slaves are the lowest rank of Dagoth Ur's personal servants. They are covered in corprus and their faces appear to be covered in ash. They have limited magic abilities and can be very dangerous.

The next step in the evolutionary process of one of Ur's servants is the "Ash Zombie". During this faze the Ash Slaves face becomes brittle and falls off leaving a gaping hole. During this time the servant loses its magical ability but gains considerable strength.

Next comes the "Ash Ghoul". After a certain amount of time the corprus inside the Ash Zombie starts to grow a strange tentacle like appendage out of the hole in the zombies face. In this form they gain a consideral amount of magical ability and are also very strong fighters. Some of Dagoth Ur's closest compainions are Ash Ghouls.

The final step would seem to be the "Ascended Sleeper". The tentacle growths inside the ghouls head eventualy completely emerge and a new head is grown where the old one was.