User blog comment:Godisme/My Take on Isshin/@comment-1769234-20100329191421

Sorry I don't read the manga I just watch the anime though his spiritual power could be on the same level as Aizen's or Yamamoto's though he has very limited control over it so he may not be able to fight with that kind of power yet. Though if he had 4 times the spiritual power as with he fought Uliquiorra while he was in his Segunda Etapa if that is what you mean his even being there could bringer Uliquiorra to his knees plus having Uryu and Orihime there the force of his spiritual power alone could maybe kill them don't think though these are just theories.