Board Thread:Questions and Answers/@comment-5780397-20151222190152/@comment-5780397-20151224182035

That's what I said, Nen goes against traditional physics because it does not have a mass, but benefits from speed. The concept of Nen itself (lfe energy) goes beyond physics. Besides, energy does not have a mass, right? If it were as you said, a Nen user should become heavier the more aura they use, and this would mean that they would produce mass out of nothing every time they release their aura.