The King of Mu would definitely sense the egg. When he didn't sense its presence on the headless body, he would naturally suspect it was a decoy.
He would believe the Su Ze with the egg was the real one.
Su Ze only needed to observe the King of Mu's actions to determine which of his two bodies had the egg.
His plan was to abandon the body parasitized by the egg. This meant giving up half of his body and soul, which would be a devastating blow to him.
But he had no choice. To eliminate the threat of the egg, he needed the resolve to make a painful sacrifice.
When the King of Mu chose to pursue the Su Ze in the left corridor, the Su Ze in the right corridor quietly slipped away. He transformed to look like Feng Bqing, scaring off all the maids and servants in the imperial palace and driving away all the guards.
