Board Thread:Questions and Answers/@comment-10797017-20130624101208/@comment-8986886-20130712183134

Yeah, but whoever wrote that Kidô ranges from level 1-99 must have gotten the information from somewhere, the manga, or anime, an interview with Kubo, a character book ect.

Otherwise what's to say that the scale doesn't reach 125 and that we just haven't seen the most powerful spells yet?

For example, the +100 spells could be restricted to Wartime Use Only; which would explain why we haven't seen them utilized yet.

Perhaps they are so dangerous to the caster, that if mistakes are made when executing the spell, the caster is killed. Imagine Shakkahô blowing up in Renji's face, only 100 times stronger. ^^