Board Thread:Off Topic/@comment-91.155.148.198-20130311195054/@comment-24265332-20131214051145

Somewhat yes. You have to get your conjuration up to a level 90 then speak to a teacher at the college. He will then give you a mission where you go to the roof to summon an unbound dremora which you have to fight twice before it will go get you a sigil stone. Before or after you do this mission you can buy master spells from that same teacher. After you do it the unbound dremora will go get you the sigil stone. Then you must take it to the teacher and you can then put it on the atronach forge.