User blog comment:B214/Question and Answers/@comment-98.26.119.147-20140112152906/@comment-1359322-20140112154639

Did you know Ishibumi originally planned to have Ophis die in Volume 12, using all her remaining powers to reincarnate Issei but he decided not to because he feels that it would be too tragedic for Ophis to die after being used and toyed with.