Kai Syaoran then stood over the humans for over a minute without saying anything. He wanted the feeling of defeat and helplessness to truly enter their hearts. He did this to make them understand that he was not giving them suggestions but their only route to survival.
He did not want to kill the humans but that was only because he wanted to have some pains to do his bidding. Starting with the humans that had tried to kill him was a good opportunity.
"Since you turned down my first proposal and even tried to kill me for a second time, you will not only have to collect for me the two Ice Law expressions but a few others as well.