@daxrocket
Except the dwarf literally FELT the changes, and copied an image of his untainted self into a machine.
It just means that it either:
A: Takes quite a bit of time.
B: Can only be used on a limited number (hence why none of the heavenly stars were targeted)
Or C: A combination of both.
The reason the stars weren't targeted could be because they're resistant to it, or because Lufasu would have noticed a change in them making it a bad idea.
It could easily be just because the stars are monsters, and not humanoids. Their human forms aren't their true ones.