The second arc of ''Literature/ACertainMagicalIndex'', consisting of volume 2 of the light novels and episodes 7-9 of the anime. This story arc was omitted from the manga for some reason, even through some important plot points happen here.

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* ADayInTheLimelight: For Himegami Aisa and Stiyl
* ArcVillain: Aureolus Izzard
* MookHorrorShow: Touma proves his badassery to the point a guy who can warp reality is running from him in terror.
* RealityWarper: Ars Magna allows Aureolus to shape reality according to his thoughts.
* RealityWarpingIsNotAToy: Once Aureolous' thoughts are disturbed, his power to shape reality turns against him.
* RedundantRescue: Aureolus was quite unhappy to learn some stranger saved Index before he could.
* VampireHunter: Himegami's power lets her attract vampires, who are then killed when they attempt to feed on her.

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