Negima!? Magister Negi Magi Episode 23: Wait, You Can`t Do That, Negi! That`s Right, Because We`re Your Partners!
Episode 23 of 26 of Negima!? Magister Negi Magi, aired March 7, 2007, 25 minutes. Available with English subtitles and dub where released.
Episode summary
The Star Crystal Thief, posessing Evangeline through the Star Crystal, turns Asuna against Negi and many of his allies into stone. But with the help of his remaining students, he's able to defeat her by Pactio with the vampire, which (alongside Chachamaru), completes his Pactio collection but not get them out of trouble.