I think he must've made a construct, I call BS if he regrew his arm without a A.I.
Simply put, regeneration by bodily reconstruction is
insanely computationally intensive. Bodies are
not simple. Arms consist of a wide variety of cells amounting to a total of several trillion. You have
skin tissue, which itself consists of 3 layers with varying intercelluar reinforcements, pores, several kinds of nerve receptors, and so on. And that's
just skin. You also have
muscle tissue,
ligaments, tendons,
blood vessels,
blood,
bone tissue...
I mean, have you seen the inside of bones?
It's not just a solid block of white, it's a complicated structure of carefully deposited
bone minerals mixed with blood vessels, cells which make bone, cells which
break down bone, and more.
And that's just tissues in general. Just wait until you see
cells.
LOOK AT THAT. And that's just a
broad view of the organelles. You can't see the microscopic tubles which reinforce the cell, of which there are
multiple types. You can't see the thousands of enzymes with
very specific concentrations floating around in the cytoplasm. And god help you if you want to try and memorize your DNA. And that's
just one type of cell. And cells have
subtypes. The body is
fucking complicated.
In summary, even if a power ring lets you transmute matter or create it ex nihilo, I call
bullshit that anyone with remotely human-level intelligence can actually visual or understand the body enough to repair it directly. You try to create cells, and accidentally forget that one particular signalling molecule is supposed to go
inside of the nucleus? Whoops! Now your immune system thinks your entire arm is cancer! Forget where that one bit of a transcription molecule? Now your entire arm
is cancer. And all that assumes you can even visualize it well enough to create
any of it.
This is part of the reason I love power rings so much; they come with their own little superintelligence, right in the palm of your hand. A information processing powerhouse so powerful it can repair every detail of a body within a second, scan massive areas at a atomic level and then do complex pattern identification before you can blink, and it's obedient and competent enough to (almost always) do what you
want instead of what you
tell it to do, which as we all know is a huge and difficult to solve issue with computers.
That
alone could be a superpower. But it comes bundled with one of the most powerful multi-purpose tech platforms in the universe, capable of scanning anywhere within light-hours with atomic accuracy, synthesizing and transmuting matter, creating pretty much any field or particle you want, and it has the ability to create and manipulate matter-simulacrums capable of selectively mimicking both broad and minute properties of matter.
AND PEOPLE USE IT TO MAKE GIANT GREEN FISTS.