There are no master level conjuration spells? I just noticed this as I always thought Dremora Lord was a master spell but no I guess it's expert. Seems unfinished.

Magic in Skyrim is really meh. Let's hope for a magic based dlc to fix some of the stuff there is in the vanilla game

There are master level conjuration spells. You just haven't gotten it yet.

theres master level spells in every magic skill, you have to be master level in that skill then ask the college master about it

thralls are master conjuration spells