Thread:Blaid/@comment-2089817-20121209233629/@comment-1757720-20121212085633

Actually, if you think about it, it is very possible that many of the inhabitances of Karakura Town have their own high spiritual pressures that collectivly are more than all of the Captains combined but unlikely.

Additionally, it is possible that he needs to condense a massive amount of living Reshi, therefore it is unlikely that a few Captains would have enough Reshi giving that Reshi is the physical form of a spirit. No doubt that the Key needs to be powerful, but it also needs to be durable.