Board Thread:General Discussion/@comment-27083746-20160213161250/@comment-27392440-20160214170535

I basically agree that he could relearn it but there are 2 problems with that: 1 he may believe that having it stolen means that he can't do it anymore which would create a mental block for developing it in the future, 2 it's likely that when your fullbring is lost it causes damage to the power itself as Jackie, a life long fullbringer, implied she lost even basic fullbring abilities after"dirty boots" was destroyed which would mean regaining it is likely harder.

I do have my own question while I'm at it. This may sound like a stupid question but does fullbring primarily use spirit energy? I ask because it was mentioned to Ichigo that it strains the body to use the powers (with an implication that even non-physical powers like Riruka's drain stamina as well) so one has to be in peak physical condition, that doesn't sound like it uses the spirit as energy, hinting it may use kishi/life energy (which was mentioned as existing fairly early in the series).