Possibly the Forgotten Wastes dungeon in vvardenfell.
Lets summon a Dagoth specialist @Cinbri
Lets summon a Dagoth specialist @Cinbri
Hm, I already shared it with several mods of some eso-furnishing sites year ago, but since then didn't see them mentioning it, so apparently everyone decided to keep this unholy knowledge in secret.
It was officially stated in Morrowind patchnotes just in 1 sentence that no one bothered to evaluate.
And believe me - here "rare" means "as rare as Aetheric Cipher". So trying to grind it is pointless.