Darkus's Zanpakutō:
Darkus uses the command "Fulfill" to transform Silent Chrysanthemum into a narrow shinogi with a blade longer than the wielder's hand. It has two techniques: first, it sends out high-powered sound waves that disorient the opponent, and second, it allows those fighting for a just cause to hear the sound of angels or saints singing, encouraging them to feats of courage; those fighting for an unjust cause hear the mocking laughter of demons, striking fear and doubt into their hearts.