Negima! Magister Negi Magi volume 9 collects volumes 25-27 in an omnibus format and features story and art by Ken Akamatsu.

With the plot of the insidious Cosmo Entelecheia revealed, Fate has forced Negi to choose between the safety of his friends and the destiny of the Magic World. Everyone is going to have to draw on all their strength to get out of this one, but will it be enough? Inspired by the story of his father's conquests during the war, Negi cannot fail!