The Black Blood Resonance Battle! – A Small Soul's Grand Struggle against Fear?.The black blood in Soul proves to be dangerous for both him and Maka during their battle against Crona and Ragnarok. Before Maka can be defeated again, Soul confronts the Little Demon within himself and encounters Maka, whose consciousness was brought within Soul's by the demon in an attempt to claim both of their souls. Maka discusses with the reluctant Soul her intention to use the black blood's power and gain the same madness Crona has, hoping it will allow her to reach some understanding about Crona's wavelength. Soul relents and allows Maka to go slip into madness, promising to pull her out of it before it's too late.