The Roar of Heaven (炸裂!? 飛竜昇天破 Sakuretsu!? Hiryu shoten ha?) is the 131st chapter of the manga and the seventh chapter of the Ultimate Weakness Moxibustion Arc. Ranma encourages Ryoga's belief that he tried to have his way with Akane which only makes Ryoga more angry. Ranma begins to draw him into the spiral, and Ryoga's battle aura can be seen by Akane and Cologne.