Fang Xingjian fell silent for a moment. It was true that the powers the Crown Princess displayed were very strong. Most importantly, the Crown Princess had not relied on any unique skill or unrivaled technique but the great power of her origin source.
A powerful martial will allowed her to not lose out in any confrontation.
After all, at tier six of the Divine level, the physical body and conjured physique were no longer of any importance. A person's martial will was their true form, and there were no vital points at all.
If one wished to kill a tier six Divine level expert, they would have to wipe out all of the other party's martial will. Regardless of the means used, there would almost always be a collision between their martial wills.
Although it was not as if Fang Xingjian did not have any means to kill the Crown Princess, he had no way of assuring the safety of the millions or even billions of people on the ground.