Aicantar is an Altmer conjurer who lives within Understone Keep. He helps his uncle Calcelmo in his uncle's laboratory. If Aicantar is killed, however, Calcelmo will not show any emotion. In fact, he will not even notice.
When encountered in Calcelmo's Tower during the quest Hard Answers, Aicantar will attack the Dragonborn if spotted. However, if they activate the valve opposite the door through which they entered, it will reactivate the room's in-built Dwemer defenses, killing the Guards and causing Aicantar to attempt to flee the room - usually killing himself by running through traps. Killing him may fail one of Sergius Turrianus' "Fetch" quests, if the target is Aicantar. The Dragonborn could, however, run past him and come back to Markarth another time. Upon their return, Aicantar will no longer be hostile.
If Aicantar survives the defenses, during the activation of Calcelmo's stone, he will appear at the doorway provoking an alternate dialogue between himself and the guards than would otherwise occur.
- "Don't let my uncle go on about his theories. You'll be here all night."
- "I'm afraid to touch half of the things they keep in the tower."
- "I'm Calcelmo's nephew. I help him around the laboratory."
- "I try not to think how my uncle got all those Dwemer Centurion parts."
- He is the creator of Aicantar's spider, and the spider control rod which commands it. Aicantar's spider is a Dwemer spider which has been modified so that it can be controlled by the person using the control rod.