User blog comment:Xilinoc/Ch. 664 - The Gift/@comment-25897574-20160228212945/@comment-24726378-20160301160559

Maybe they go into their zanpakuto's world much like how ichigo would to train? But I guess this begs an even bigger question: If the zanpakuto is originally just for slaying hollows, why the heck are things THIS DESTRUCTIVE necessary to destroy a simple hollow? Are there really hollows out there that require Zanka no Tachi or Kyoraku's bankai?