Board Thread:Theories and Speculation/@comment-45444155-20200521104039/@comment-45444155-20200521114007

Ravenlot 27 wrote: The explanation on Yin-Yang properties was really vague in the story, so a definite answer doesn't exist at this point.

Clearly, nothing is known, but wiki experts classify one technique after another as Yin/Yang/Yin-Yang Release.