Black March is a sentient Needle and Ignition Weapon from the 13 Month Series, crafted by the legendary craftsmaster Ashul Edwaru. The weapon has a spirit inhabiting it, which is part of what makes the entire 13 Month Series so remarkable—when ignited, these weapons can unleash devastating power that far exceeds normal gear.
Baam borrowed Black March from Yuri Jahad early on, though only for a limited time. As a B-rank weapon, it's formidable in its own right, but its true potential comes through ignition. Fans often note that Black March's sentience and personality make it stand out, especially compared to typical equipment that has no agency of its own. The spirit inside can actually interact with its wielder, which creates a dynamic that's pretty unique in the series.
Content compiled by AnimeList.moe from publicly available sources.