A Certain Magical Index II Episode 21 English Dubbed Episode Title:Learning Device (Testament).Episode Description:As Tsuchimikado battles against the spectral being who is working with Vento to kill the unconscious residents of Academy City, Tōma calls Accelerator from Last Order's cellphone to update him on her status. Accelerator soon learns that Amata has managed to capture Last Order, though is keeping her alive for some reason. Aleister then uses Testament, with Last Order's authorization, to summon an angel to appear in the city to target those who use magic. As Tōma, Index and Mikoto head towards where the angel is, Index realizes the angel is actually Hyōka. As Mikoto holds off the Hound Dogs, Index explains the nature of Vento's Divine Retribution, which targets anyone who experiences a certain emotion towards her and how Hyōka is not an ordinary angel. Tōma tells her to work with Mikoto to combine their knowledge of magic and science to figure out how to help her. Meanwhile, Accelerator breaks into the Hound Dogs' headquarters and confronts Amata. As Tōma witnesses Hyōka's controlled state and feels helpless, since using his right hand would kill her, Vento appears before him again, threatening to kill them both, so Tōma stands to defend Hyōka.