The creatures that the Prism creates are sensitive to it. Perhaps some colors more than others, depending on the balance. You can use it to fight, and defend yourself. The knife should be perfectly serviceable. ... Knives.

[ Hmmm. They consider the question about the item though. ]

Someday, possibly. If not exactly that, then certainly you can find something interesting if you endeavor hard enough. You will have time to learn, I'm sure.