Thread:Njalm2/@comment-26503587-20160329194639/@comment-3403804-20160331205058

Well, in my personal viewpoint, no it couldn't. The reason is that Hollows utilize Reiatsu-based technniques like Cero, Bala and other variations thereof, their expression of their spiritual power is very basic and simple. While it -could- theoretically be possible, it would not be likely to result in added efficiency. Imagine that Shinigami Reiryoku is like water, flowing and shifting, and then imagine that the Reiryoku of Hollows is like gelatinous, more condensed.

Shinigami can weave their energy into spells because of how their energy works, for Hollows, the process would require an immense amount of training and discipline. Something few of them seem willing to endure. It is certainly possible to refine the process in a manner that they can cast spells, but if they didn't, the spells would manifest solidly and harmlessly. A Danku spell might manifest as a rectangular wall of condensed gelatinous white goo, as opposed to an invisible wall when cast by an Arrancar.

That being said. It isn't totally impossible, just highly improbable and impractical.