Conjuration Ritual Spell Conjuration Ritual Spell is a quest available in . This is a quest that can be initiated once the Dragonborn reaches Conjuration level 90 , which presents the ability to summon even more powerful creatures . Walkthrough . Once level 90 Conjuration is reached , a new dialogue option appears with Phinis Gestor : " What else is there to be learned about Conjuration magic ? " He mentions that , in order to give any higher - level Conjuration spells , he must have a sigil stone from an Oblivion gate . He then teaches the Summon Unbound Dremora spell . He tells the Dragonborn to climb up to the roof of the Hall of Attainment , use the spell , then defeat the summoned unbound dremora . Battle . Although many tactics for destroying the dremora are available , Daedra are vulnerable to shock damage . Thus , entering the battle with lightning magic , weapons imbued with electricity , and Dragon Shouts such as Storm Call will optimize damage output , and as such the battle will take less time . Once summoned , the unbound dremora attacks the Dragonborn , regardless of the dialogue choice . Having a follower present helps , as the dremora prefers close combat . The follower can serve as a decoy while the Dragonborn casts spells or shoots arrows from afar . Casting Banish or Expel Daedra repeatedly drains the dremora ' s health but does not destroy it immediately as it would with lesser Daedra . Having the Oblivion Binding perk and using bound weapons on the dremora does not banish it as it would any other Dremora or Atronach . Without a follower , a Flame Atronach or other conjured beings can serve as shields or distractions while the Dragonborn unleashes lethal Destruction spells , and a powerful enough summon such as another Dremora Lord could defeat it with relative ease . Also , Unrelenting Force may be used to throw it off the tower which will finish it off instantly . The dremora will need to be defeated twice before it will submit . Each time it is defeated , it must be summoned again . After the second defeat , it submits . If the unbound dremora cannot be summoned again before it submits , be sure that its soul has not been captured and the dialogue preceding each round of battle hasn ' t been skipped . Aftermath . After defeating the dremora , the Dragonborn orders it to retrieve the Sigil Stone . When it is summoned again , the stone can be accepted , then brought to Phinis Gestor . Making this quest an active quest helps with locating him . When Phinis is approached , there is a new dialogue option , " I have your sigil stone . " He says that he just needs to borrow it , and the conversation ends . Speaking to him again reveals yet another dialogue option , " What did you see ? " Taking this option causes him to return the sigil stone , plus reward the Dragonborn with a Flame Thrall spell tome . After this , Phinis offers the other thrall spells for a considerable fee . All these spells summon thralls with no expiration . The sigil stone can also be used at the Atronach Forge , located in The Midden underneath the College . It can be placed on the pedestal , allowing the crafting of Daedric armor , weapons , and Daedra hearts . The unbound dremora remains at the College .