You know when you think about it, Chromastone and Feedback have alot in common; both absorb energy and can use it offensively and both require absorbed energy, as the energy contained within them will deplete with use.So Chromastone is like "The Feedback of Ultimate Alien." So if he were to absorb reishi like Feedback did in Bleach: Omniverse, would the effects be similar? (Since Ben doesn't have Feedback in B: UA)
I'm not sure if you or Bigby know about this, but I recently came across a website called "Bleach: Fanfiction Wiki". That's where I found fanmade images of Harribel and Nelliel with Segunda Etapa, and they both look so realistic. Maybe if you showed them to Bigby, he might consider using them. Here are the links if you wanna see them:
Just out of curiousity, about how many chapters do you, Pyro, and Kamen plan to make for Bleach: Ultimate Alien Volume 2, before you begin Volume 3? I'm just eager to see the Thousand-Year Blood War arc begin in the Original Timeline.