It's okay but why did you make it where they can share their white and dark elements and why to make it where they both have to be the same strength there are more bits I find annoying but these are the most
Suiyan
Liked it!
LIKEAlthough your feedback is appreciated it feels more like a nitpick, for nitpicks like these it is more reasonable to either say it in the comments or write a full review and include this, plus it is hard to tell whether you are rating this specific aspect or the entire novel. For reviews please rate based on the quality of the novel and not the quality of a specific plot device.