Board Thread:General Discussion/@comment-27392440-20160103165852

I think it's established that zanpakuto come from a shinigami's own soul, so can anyone explain any good theories as to how he seems to have so many? My current theory is that they are his "swords of weakness" (like all the swords Ichigo manifested when he was training for his bankai) and that he manifested each one through an asauchi so that he could refine that blade of his that can cut through anything by separating out it's weaknesses. Is this theory good or are there any other ideas that could better? 