dark negi eye

Some of the girls seemed interested in his new powers and only wondered about it a bit, but I feel as though Asuna and Nodoka will be affected by this new form of his the most. Being the person that he is, Negi will probably tell them all about it. I only wonder though if he's already being consumed by his new powers like one of the demons said during the demon's explanation of the technique. I say this as Negi seemed to hold his head in pain when he used it too much.(This really should be in a Note or something. I just love the Negima series though. Can I send you a note?)