User blog comment:Xilinoc/Ch. 575 - THE KILLERS HIGH/@comment-14244059-20140403071431/@comment-14244059-20140403222949

Well, even if it is a human-based weapon, if it was created by a Quincy - and therefore would be made out of reishi and fire reishi/reiryoku projectiles - I imagine it would still be considered a Spirit Weapon.