File:Mage blank dialogue.png

generic mage NPC via Summon Monster spell, blank dialogue you get after talking to him once. Even if you summon another mage, they will also give blank dialogue, so it seems the game treats all instances of this NPC as the same in terms of dialogue. Killing him doesn't make a difference. The only way you can see all of his lines in one savegame is by saving before you talk to him and restoring your game repeatedly.