Since the Tianxin Mark has already acted, even if this dragon ball conceals a wisp of a Demon Emperor's residual soul, it is doomed to wither; there is no question about it.
Furthermore, it is impossible for any residual soul of a Demon Emperor to truly be hidden within it.
"Still, I suppose one can never be entirely certain. The fact that this thing could trigger the Tianxin Mark's automatic defensive mechanism proves that it threatened my life, which makes it truly terrifying.
Chapter 261