Black March (Tower Of God) (검은 삼월, 검은 三月, Geomeun Sahmwol; "Black Third Moon") is one of the 13 Month Series made by the blacksmith or crafts master, Ashul Edwaru. The weapon is sentient and has a girl spirit inside it and when ignited, it is capable of unleashing extreme power like the other 13 Month Series.
As a weapon, it is a jet black needle that is extremely thin with a slightly thicker handle. On the handle "Black March" is embroidered in cursive.