The wonderful thing about artifacts is that they're quasi-living things, they change their charms as new wielders bond with them. Apparently this one is pretty solidly a critic, but the right Lunar might be able to pivot it from "perfection is an unattainable thing worth striving for" to "perfection is a blade that never stops cutting".

I don't think you'll ever get the dark tinge entirely out of it, given its origins, but I could easily see it switching from one kind of mindfuck to the other - a thing that leans into obsessive perfectionists rather than breaking...