User blog comment:Martialmaniac/The Zero Hand and Transmutation/@comment-25814498-20170120232303

I looked at the scene again (thanks by the way, completely forgot how utterly fucking awesome that entire confrontation was), and your completely right on the most part. The narrator says his aura transformed into light and it came out a translucent wavy rainbow, so there's not much ambiguity there. I haven't read the manga, so I'll just take your word with that. Regarding the anime, however, I don't think it's right to call it solely transmuted light. Whilst it certainly looked that way, it created a massive amount of kinetic and sound energy also, and light is generally just a release of energy rather than an individual entity, so it wouldn't make sense for it to erupt from the bodhisattva's mouth with such ferocity if it were purely light; as I'm sure your aware, turning on a flashlight doesn't usually create a "Merciless Roar" and send wind flying everywhere.

I think he was being more metaphorical in the sense that his Aura was so prevalent and powerful it came out as a blinding stream of light, rather that just light on its own. But then again, the author's word comes before my own, so that may not be worth much.