" it needs adjustment, as it currently creates riddles."
This sentence implies that the question is a riddle. Therefore, there is some trick that makes it not just 1 white/1 black. This --stupid-- theory is supported by the line person with the "best" answer gets something, which implies there is no single correct answer, or at least the answer isn't right/left.

The only claim the post really makes is that " one of these units belongs to white team." and "void magic will have a graphical impact" that "needs adjustment". Perhaps, then, the graphical impact adjusts automatically, based on, for example, the backdrop - voided units are colored differently based on both black and white squares. The only logical conclusion is that both pieces are white.