User blog comment:Godisme/Come Around Our Turn/@comment-28861328-20110826015559/@comment-2048489-20110826212106

Let me explain my interpretation of the "raised his base power." Again. Kugo specifically said "the fullbring I gave him raised his base power." "Base power" means his power at his absolutely basic level. Ground zero, so to speak. You can build skyscrapers upon that base, but improve things at the foundation and the whole building is strengthened overall. As for how it improved, I'll just cite what Ichigo said earlier about his Shinigami powers: even though they were gone, some effects (eg: his insane reaction times) from having them still lingered. Likewise, I believe the Fullbring is gone, but having felt its touch Ichigo did not come out of the experience unchanged. Just my two cents on that. I don't know if that's precisely the case, but that's my best explanation.

On the X: manifestation of soul. Fullbrings, regardless that they are supposedly the opposite of who the people with them are, seem to still manifest aspects of the person's character. Huge speculation alert on that, but I think we can all agree that no matter what has been said, Ichigo's Fullbring especially has been a manifestation of his own soul. (eg: literally cloaked in power)