Board Thread:Questions and Answers/@comment-108.205.136.124-20140225234503/@comment-64.247.68.118-20140309172830

Guys, the life fibers haven't really been shown to regenerate, just stick things back together. Raygo didn't sprout a new hand or head when they were cut, she stuck the old one back on. I seriously doubt the blade itself has anything to do with it, Nui probably just doesn't have her old eye anymore.

Also, I would like to point out that the one scissor we know a lot about has been turned into different forms. Mostly just the tiny scissor, but still, we don't know if the scythe form is unique to Nui's blade or just Nui's preferred form to use it in. While it's possible that they can do different things, the fact that they've been shown to do things that seem within the limits of or possible for each of them and the fact that they were originally one item suggests they're the same, the only differences coming from training and usage.